Super-Massive Black Hole Inflates Giant Bubble

Some black holes actively accrete matter. Part of this material do not fall into the black hole but is ejected in a narrow stream of particles, traveling at nearly the speed of light. When the stream slows down, it creates a tenuous bubble that can engulf the entire galaxy. Invisible to optical telescopes, the bubble is very prominent at low radio frequencies. The new International LOFAR Telescope - designed and built by ASTRON in an international collaboration - is ideally suited to detect this low frequency emission.

Astronomers have produced one of the best images ever of such a bubble, using LOFAR to detect frequencies from 20 to 160 MHz. "The result is of great importance", says Francesco de Gasperin, lead author of the study that is being published in the journal Astronomy & Astrophysics. "It shows the enormous potential of LOFAR, and provides compelling evidence of the close ties between black hole, host galaxy, and their surroundings."

The image was made during the test-phase of LOFAR, and targeted the giant elliptical galaxy Messier 87, at the centre of a galaxy cluster in the constellation of Virgo. This galaxy is 2000 times more massive than our Milky Way and hosts in its centre one of the most massive black holes discovered so far, with a mass six billion times that of our Sun. Every few minutes this black hole swallows an amount of matter similar to that of the whole Earth, converting part of it into radiation and a larger part into powerful jets of ultra-fast particles, which are responsible for the observed radio emission.

“This is the first time such high-quality images are possible at these low frequencies", says professor Heino Falcke, chairman of the board of the ILT and co-author of the study. "This was a challenging observation - we did not expect to get such fantastic results so early in the commissioning phase of LOFAR."

To determine the age of the bubble, the authors added radio observations at different frequencies from the Very Large Array in New Mexico (USA), and the Effelsberg 100-meter radio telescope near Bonn (Germany). The team found that this bubble is surprisingly young, just about 40 million years, which is a mere instant on cosmic time scales. The low frequency observation does not reveal any relic emission outside the well-confined bubble boundaries, this means that the bubble is not just a relic of an activity that happened long ago but is constantly refilled with fresh particles ejected by the central black hole.

"What is particularly fascinating", says Andrea Merloni from the Max-Planck Institute of Extraterrestrial Physics in Garching, who supervised de Gasperin's doctoral work, "is that the results also provide clues on the violent matter-to-energy conversion that occurs very close to the black hole. In this case the black hole is particularly efficient in accelerating the jet, and much less effective in producing visible emission."

First Feathered Dinosaurs in North America

 

The new study, led by paleontologists Darla Zelenitsky from the University of Calgary and François Therrien from the Royal Tyrrell Museum of Palaeontology, describes the first ornithomimid specimens preserved with feathers, recovered from 75 million-year-old rocks in the badlands of Alberta, Canada.

"This is a really exciting discovery as it represents the first feathered dinosaur specimens found in the Western Hemisphere," says Zelenitsky, assistant professor at the University of Calgary and lead author of the study. "Furthermore, despite the many ornithomimid skeletons known, these specimens are also the first to reveal that ornithomimids were covered in feathers, like several other groups of theropod dinosaurs."

The researchers found evidence of feathers preserved with a juvenile and two adults skeletons ofOrnithomimus, a dinosaur that belongs to the group known as ornithomimids. This discovery suggests that all ornithomimid dinosaurs would have had feathers.

The specimens reveal an interesting pattern of change in feathery plumage during the life of Ornithomimus. "This dinosaur was covered in down-like feathers throughout life, but only older individuals developed larger feathers on the arms, forming wing-like structures," says Zelenitsky. "This pattern differs from that seen in birds, where the wings generally develop very young, soon after hatching."

This discovery of early wings in dinosaurs too big to fly indicates the initial use of these structures was not for flight.

"The fact that wing-like forelimbs developed in more mature individuals suggests they were used only later in life, perhaps associated with reproductive behaviors like display or egg brooding," says Therrien, curator at the Royal Tyrrell Museum and co-author of the study.

Until now feathered dinosaur skeletons had been recovered almost exclusively from fine-grained rocks in China and Germany. "It was previously thought that feathered dinosaurs could only fossilize in muddy sediment deposited in quiet waters, such as the bottom of lakes and lagoons," says Therrien. "But the discovery of these ornithomimids in sandstone shows that feathered dinosaurs can also be preserved in rocks deposited by ancient flowing rivers."

Because sandstone is the type of rock that most commonly preserves dinosaur skeletons, the Canadian discoveries reveal great new potential for the recovery of feathered dinosaurs worldwide.

The fossils will be on display this fall at the Royal Tyrrell Museum in Drumheller, Alberta.

OCTOBER 25 – EVENTS – Science events on October 25th

  Lung transplant

   

          In 1990, the first transplant operation of a lung from a live donor to a recipient is performed by Dr. Vaughn A. Starnes, Stanford University Medical Center, Stanford,   California. A mother was the living donor to her 12-year-old daughter. Dr Starnes is a world-renowned pediatric cardiothoracic surgeons who has performed several transplantation "firsts," including transplanting a heart and lung into a four-month old baby - the youngest ever. Lung transplantation was first attempted in 1963, and heart-lung transplantation in 1968. The first successful heart-lung transplant, by Dr. Bruce Reitz, was at Stanford in 1981. The world's first successful lung transplants were at Toronto General Hospital, Ont. (Single lung, 1983; double,1986).

  Cheops' second solar boat viewed

   In 1987, at Giza, Egypt, the second of Cheops' solar boats was first viewed using a specialized video camera. It was passed through a hole drilled one of the limestone slabs covering the pit in which the boat had lain undisturbed for 4,600 years. The hole was drilled over the three preceding days, with careful technique to retain the original air in the sealed chamber. After extensive video records were made, the entrance hole was resealed. The first funeral craft of the pharaoh Cheops (aka Khufu) was discovered 26 May 1954. It had been built from sacred sycamore and cedar woods, ready to carry his soul to heaven and sealed in a stone-slab covered pit beside his pyramid. It was eventually removed for museum display.« [Image: Museum display of the first Cheops boat discovered.]

  Belgian nuclear reactor

   In 1962, Belgium's first nuclear powered generation of electricity began with the inauguration of the BR-3 power plant at Mol by Minister Spinoy. The BR-3 Pressurized Water Reactor was the firstPWR-type in Europe. Construction began Jan 1956 and it ceased operation 30 Jun 1987 at the end of its Westinghouse license. The BR-1 was a research reactor put into operation at Mol in 1956 with thermal power of 4 MW. The BR-2 was a materials testing reactor at Mol in 1963 with thermal power 80 MW. Presently, Belgium produces 55% of their electricity from seven newer nuclear units, at Doel and Tihange, which generated almost 44 TWh in 1998.

  Accutron

   In 1960, the Accutron 214, the world's first electronic wristwatch by Bulova, was placed on sale in New York City. The original circuit used a germanium PNP transistor circuit with a 360-Hz tuning fork, used for timing accuracy. In 1977 it was replaced by quartz watches. The Accutron has the potential accuracy of better than 2 seconds per day, remarkable in its day of mechanical watches. In 1953, tuning fork watch development began in Switzerland and prototype watches were made in 1955. Its Swiss engineer was Max Hetzel, who moved in 1959 to continue his development of the Bulova Accutron in New York with William Bennett. The CEO of Bulova at the time was Omar Bradley, 5 Star General, US Army, Retired.

  Microwave oven

   In 1955, the first domestic microwave oven was sold by Tappan. In 1947, Raytheon demonstrated the "Radarange," the world's first microwave oven. Ratheon's commercial, refrigerator-sized microwave ovens cost between $2,000 and $3,000. In 1952, Raytheon entered into a licensing agreement with Tappan Stove Company which had a consumer distribution and marketing infrastructure. In 1955, Tappan introduced the first domestic microwave oven, a 220-volt more compact wall-unit the size of a conventional oven, but less powerful microwave generating system. It had two cooking speeds (500 or 800 watts), stainless steel exterior, glass shelf, top browning element and a recipe card drawer. However, at $1,300 sales were slow.« [Image: Oven shown on cover of Tappan "Commercial Electronic" Replacement Parts Catalog revised issue of 15 May 1964.]

  Air brush

   In 1881, Leslie L. Curtis of Cape Elizabeth, Maine, patented an air brush painting device. His patent No. 248,579 describes an "Atomizer for Coloring Pictures," which was a "device for easy, accurate, and rapid distribution of coloring and shading upon drawings and paintings." Coloring matter could be projected upon the picture in the form of a fine spray. It was drawn up a tube from a bottle when air passed over an aperture in the upper end of the tube and was separated into a fine spray. The fineness of the spray could be regulated. Holes were provided in the rear of the air-tube to be covered with the thumb of the hand that held the container while in use. Removing the thumb caused the flow of coloring material from the fine nozzle to cease.

  Moon of Saturn

   In 1671, Giovanni Cassini discovered Iapetus, one of Saturn's moons. Iapetus is the third largest and one of the stranger of the 18 moons of Saturn. Its leading side is dark with a slight reddish color while its trailing side is bright. The dark surface might be composed of matter that was either swept up from space or oozed from the moon's interior. This difference is so striking that Cassini noted that he could see Iapetus only on one side of Saturn and not on the other. In Greek mythology Iapetus was a Titan, the son of Uranus, the father of Prometheus and Atlas and an ancestor of the human race. Cassini (1625-1712), first director of the Paris Royal Observatory, also discovered other moons of Saturn (Tethys, Dione, Rhea) and the major gap in its rings.

5 Inventions by Thomas Edison (That You've Never Heard Of)

1.Electrographic vote-recorder

Renewing the Grid Image Gallery

Edison is known for inventing the light bulb, but he had numerous lesser-known inventions. See more pictures of renewing the grid.

©iStockphoto.com/RapidEye

Without question, our lives would be very different without the inventions of Thomas Alva Edison. This prodigious creator changed our culture in countless ways with the seemingly miraculous devices that flooded out of his New Jersey laboratory.

Edison, born in Ohio in 1847, obtained his first patent at the age of 22. The last patent in his name was granted two years after his death, in 1933. In between, he tallied 1,093 United States patents and 1,200 patents in other countries [source: Rutgers]. Biographers have figured that Edison averaged a patent every two weeks during his working life. Even though many of his inventions were not unique -- and he engaged in some well-publicized court battles with other inventors whose ideas he "borrowed" -- Edison's skill at marketing and using his influence often got him the credit.

Most of Edison's inventions fall into eight main categories: batteries,electric lights and power, phonographs and sound recording, cement, mining, motion pictures, telegraphs and telephones. But while the Wizard of Menlo Park is remembered for his major inventions -- the motion picture, the incandescent light bulb and the phonograph -- his tireless mind also came up with some ideas that aren't so well known and some that weren't welcomed by the public. Keep reading to find out why members of Congress rejected a machine designed to make them more efficient and how another Edison invention frightened little girls and angered their parents. You'll also find out about a device that could have kept Edison's genius with us even today.

Congress had little interest in Edison's electrographic vote-recorder.

©iStockphoto.com/GarysFRP

Edison was a 22-year-old telegraph operator when he received his first patentfor a machine he called the electrographic vote-recorder. He was one of several inventors at the time developing methods for legislative bodies, such as the United States Congress, to record their votes in a more timely fashion than the time-honored voice vote system.

In Edison's vote-recorder, a voting device was connected to the clerk's desk. At the desk, the names of the legislators were embedded in metal type in two columns -- "yes" and "no." Legislators would move a switch on the device to point to either "yes" or "no," sending an electric current to the device at the clerk's desk. After voting was completed, the clerk would place a chemically treated piece of paper on top of the metal type and run a metal roller over it. The current would cause the chemicals in the paper to dissolve on the side for which the vote should be recorded. "Yes" and "no" wheels kept track of the vote totals and tabulated the results.

A friend of Edison's, another telegraph operator named Dewitt Roberts, bought an interest in his machine for $100 and took it to Washington. But Congress wanted no part of any device that would increase the speed of voting -- decreasing the time for filibusters and political wheeling and dealing -- so young Edison's vote-recorder was sent to the political graveyard.

2.Pneumatic stencil pen

Edison invented the ancestor of the tattoo gun -- the pneumatic stencil pen. This machine, which Edison patented in 1876, used a rod tipped with a steel needle to perforate paper for printing purposes. It's important on its own as one of the first devices that could efficiently copy documents.

In 1891, tattoo artist Samuel O'Reilly was awarded the firstpatent for a tattoo machine -- a device allegedly based on Edison's stencil pen. O'Reilly apparently produced only one of the machines and that was for his own personal use -- there is no record of his marketing his device.

O'Reilly immigrated to New York City from Ireland in 1875. After he developed his tattoo machine, many sideshow and circus attractions began frequenting his shop at No. 11 Chatham Square. The machine was much quicker than hand tattooing, and the performers thought it gave cleaner results. After O'Reilly's death in 1908, a student took up his trade and machine and worked at Coney Island until the 1950s.

3.Magnetic iron-ore separator

Probably the biggest financial failure of Edison's career was the magnetic iron-ore separator. The idea, which Edison's laboratory experimented with during the 1880s and 1890s, was to use magnets to separate iron ore from unusable low-grade ores. This would mean that abandoned mines could be profitable once again through the extraction of iron from sand at the sites -- at the time, iron ore prices had risen to unprecedented heights.

Edison's laboratory was preoccupied with developing a magnetic iron-ore separator and putting it to practical use. He acquired rights to 145 abandoned mines and set up a pilot project at the Ogden mine in New Jersey. Edison poured money into the project, gradually selling most of his interest in the General Electric Company to pay for his work. But the engineering problems were never worked out and the price of iron ore fell, leading Edison to finally abandon his iron-ore separator.

4.The Electric power meter

All sorts of issues arise when you're doing something that has never been done before -- like running electrical services to businesses and residences. You need a way to measure how much customers consume so you'll know what to bill them.

Edison solved this problem by patenting the Webermeter in 1881. The Webermeter contained two or four electrolytic cells with zinc at both electrodes and a zinc sulfate solution. The zinc transferred from one electrode to the other at a set rate as electricity was used. The meter reader removed the electrolytic cells at each reading for weighing, replacing them with new ones.

5.Method of preserving fruit

Another Edison invention came about as a result of the laboratory's work with glass vacuum tubes in the development of the incandescent light bulb. In 1881, Edison filed for a patent for a method to preserve fruits, vegetables or other organic substances in a glass vessel. The vessel was filled with the items to be preserved, and then all the air was sucked from it with an air pump. The vessel tube was sealed with another piece of glass.

Another food-related invention, wax paper, is often attributed to Edison, but it was invented in France in 1851 when Edison was just a child. Edison did use wax paper in his sound recording work, which might be where the story originated.

Lab Safty rules

		1. Conduct yourself in a responsible manner at all times in the laboratory. 2. Follow all written and verbal instructions carefully.  If you do not understand a direction or part of a procedure, ASK YOUR TEACHER BEFORE PROCEEDING WITH THE ACTIVITY. 3. Never work alone in the laboratory.  No student may work in the science classroom without the presence of the teacher. 4. When first entering a science room, do not touch any equipment, chemicals, or other materials in the laboratory area until you are instructed to do so. 5. Perform only those experiments authorized by your teacher.  Carefully follow all instructions, both written and oral.  Unauthorized experiments are not allowed. 6. Do not eat food, drink beverages, or chew gum in the laboratory.  Do not use laboratory glassware as containers for food or beverages.
		7. Be prepared for your work in the laboratory.  Read all procedures thoroughly before entering the laboratory.  Never fool around in the laboratory.  Horseplay, practical jokes, and pranks are dangerous and prohibited.  8. Always work in a well-ventilated area.   9. Observe good housekeeping practices.  Work areas should be kept clean and tidy at all times.  10. Be alert and proceed with caution at all times in the laboratory.  Notify the teacher immediately of any unsafe conditions you observe. 11. Dispose of all chemical waste properly.  Never mix chemicals in sink drains.  Sinks are to be used only for water. Check with your teacher for disposal of chemicals and solutions.  12. Labels and equipment instructions must be read carefully before use.  Set up and use the equipment as directed by your teacher. 13. Keep hands away from face, eyes, mouth, and body while using chemicals or lab equipment.  Wash your hands with soap and water after performing all experiments.  14. Experiments must be personally monitored at all times.  Do not wander around the room, distract other students, startle other students or interfere with the laboratory experiments of others. 15. Know the locations and operating procedures of all safety equipment including: first aid kit(s), and fire extinguisher.  Know where the fire alarm and the exits are located. 16. Know what to do if there is a fire drill during a laboratory period; containers must be closed, and any electrical equipment turned off.
CLOTHING		17. Any time chemicals, heat, or glassware are used, students will wear safety goggles. NO EXCEPTIONS TO THIS RULE! 18. Contact lenses may be not be worn in the laboratory. 19. Dress properly during a laboratory activity.  Long hair, dangling jewelry, and loose or baggy clothing are a hazard in the laboratory.  Long hair must be tied back, and dangling jewelry and baggy clothing must be secured.  Shoes must completely cover the foot.  No sandals allowed on lab days. 20. A lab coat or smock should be worn during laboratory experiments.
ACCIDENTS AND INJURIES		21.   Report any accident (spill, breakage, etc.) or injury (cut, burn, etc.) to the teacher immediately, no matter how trivial it seems.  Do not panic.  22. If you or your lab partner is hurt, immediately (and loudly) yell out the teacher's name to get the teacher's attention.  Do not panic.  23. If a chemical should splash in your eye(s) or on your skin, immediately flush with running water for at least 20 minutes. Immediately (and loudly) yell out the teacher's name to get the teacher's attention.
HANDLING CHEMICALS		24. All chemicals in the laboratory are to be considered dangerous. Avoid handling chemicals with fingers. Always use a tweezer. When making an observation, keep at least 1 foot away from the specimen. Do not taste, or smell any chemicals.  25. Check the label on all chemical bottles twice before removing any of the contents.  Take only as much chemical as you need. 26. Never return unused chemicals to their original container. 27. Never remove chemicals or other materials from the laboratory area.
HANDLING GLASSWARE AND EQUIPMENT		28. Never handle broken glass with your bare hands.  Use a brush and dustpan to clean up broken glass.  Place broken glass in the designated glass disposal container. 29. Examine glassware before each use.  Never use chipped, cracked, or dirty glassware. 30. If you do not understand how to use a piece of equipment,ASK THE TEACHER FOR HELP! 31. Do not immerse hot glassware in cold water.  The glassware may shatter.
HEATING SUBSTANCES		32. Do not operate a hot plate by yourself.  Take care that hair, clothing, and hands are a safe distance from the hot plate at all times.  Use of hot plate is only allowed in the presence of the teacher. 33. Heated glassware remain very hot for a long time.  They should be set aside in a designated place to cool, and picked up with caution.  Use tongs or heat protective gloves if necessary. 34. Never look into a container that is being heated. 35. Do not place hot apparatus directly on the laboratory desk.  Always use an insulated pad.  Allow plenty of time for hot apparatus to cool before touching it.

Some Accidental science discoveries

No. 1 - Radioactivity

Two words that you don't ever want to hear said in the same sentence are "Whoops!" and "radioactive." But in the case of physicist Henri Becquerel's surprise discovery, it was an accident that brought radioactivity to light.

Back in 1896 Becquerel was fascinated by two things: natural fluorescence and the newfangled X-ray. He ran a series of experiments to see if naturally fluorescent minerals produced X-rays after they had been left out in the sun.

One problem - he was doing these experiments in the winter, and there was one week with a long stretch of overcast skies. He left his equipment wrapped up together in a drawer and waited for a sunny day.

When he got back to work, Becquerel realized that the uranium rock he had left in the drawer had imprinted itself on a photographic plate without being exposed to sunlight first. There was something very special about that rock. Working with Marie and Pierre Curie, he discovered that that something was radioactivity.

No. 2 - Microwave oven

In 1945, an engineer and inventor by the name of Percy Lebaron Spencer, was working on making magnetrons, which were used to create microwave radio signals for use in radars. While working with his magnetron, Spencer began to notice that the chocolate bar he had in his pocket was beginning to melt. Interested in what was happening, he deduced that the microwave had caused the chocolate bar to melt. Testing further, he tested out popcorn kernels and then an egg, which subsequently exploded.

From here, the microwave oven was born. While initial models were extremely large (750 pounds) and the size of a fridge in the 1950s, selling for over $4,000, as time went on the cost and size of the microwave oven decreased making it much more accessible.

No. 3 - Slinky

The slinky is the result of an accident.

Bernard Gotfryd/Getty Images

In 1943, naval engineer Richard James was trying to develop a spring that would support and stabilize sensitive equipment on ships. When one of the springs accidentally fell off a shelf, it continued moving, and James got the idea for a toy. His wife Betty came up with the name, and when the Slinky made its debut in late 1945, James sold 400 of the bouncy toys in 90 minutes. Today, more than 250 million Slinkys have been sold worldwide.

No.4 -Potato chips

A customer complaint led to the creation of the potato chip.

© iStockphoto.com/Dana Bartekoske

If you can't eat just one potato chip, blame it on chef George Crum. He reportedly created the salty snack in 1853 at Moon's Lake House near Saratoga Springs, New York. Fed up with a customer who continuously sent his fried potatoes back, complaining that they were soggy and not crunchy enough, Crum sliced the potatoes as thin as possible, fried them in hot grease, then doused them with salt. The customer loved them and "Saratoga Chips" quickly became a popular item at the lodge and throughout New England.

Eventually, the chips were mass-produced for home consumption, but since they were stored in barrels or tins, they quickly went stale. Then, in the 1920s, Laura Scudder invented the airtight bag by ironing together two pieces of waxed paper, thus keeping the chips fresh longer. Today, chips are packaged in plastic or foil bags or cardboard containers and come in a variety of flavors, including sour cream and onion, barbecue, and salt and vinegar.

No. 5 - Fire Works

Fireworks were created by a cook using kitchen items.

Domino/Getty Images

Fireworks originated in China some 2,000 years ago, and legend has it that they were accidentally invented by a cook who mixed together charcoal, sulfur, and saltpeter -- all items commonly found in kitchens in those days. The mixture burned and when compressed in a bamboo tube, it exploded. There's no record of whether it was the cook's last day on the job.

No.6 - Super glue

More sticky stuff, though this one was famous for its high adhesive value, unlike Silver’s Post-It Notes. Superglue came into being in 1942 when Dr Harry Coover was trying to isolate a clear plastic to make precision gun sights for handheld weaponry. For a while he was working with chemicals known as cyanoacrylates, which they soon realized polymerized on contact with moisture, causing all the test materials to bond together. It was obvious that these wouldn’t work, so research moved on.

6 years later, Coover was working in a Tennessee chemical plant and realized the potential of the substance when they were testing the heat resistance of cyanoacrylates, recognizing that the adhesives required neither heat nor pressure to form a strong bond. Thus, after a certain amount of commercial refinement, Superglue (or “Alcohol-Catalyzed Cyanoacrylate Adhesive Composition”, to give it its full name) was born.

It was later used for treating injured soldiers in Vietnam – the adhesive could be sprayed on open wounds, stemming bleeding and allowing easier transportation of soldiers; adding a delicious layer of irony to the story in that a discovery made during an effort to improve the killing potential of guns ended up saving countless lives.

Ten Amazing science Facts

1. There are 62,000 miles of blood vessels in the human body – laid end to end they would circle the earth 2.5 times

2. At over 2000 kilometers long, The Great Barrier Reef is the largest living structure on Earth

3. The risk of being struck by a falling meteorite for a human is one occurrence every 9,300 years

4. A thimbleful of a neutron star would weigh over 100 million tons

5. A typical hurricane produces the energy equivalent of 8,000 one megaton bombs

6. Blood sucking hookworms inhabit 700 million people worldwide

7. The highest speed ever achieved on a bicycle is 166.94 mph, by Fred Rompelberg

8. We can produce laser light a million times brighter than sunshine

9. 65% of those with autism are left handed

10. The combined length of the roots of a Finnish pine tree is over 30 miles

Science Quotes

Science Quotes

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. 
Albert Einstein 

Our scientific power has outrun our spiritual power. We have guided missiles and misguided men. 
Martin Luther King, Jr. 

Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know it so it goes on flying anyway. 
Mary Kay Ash 

No amount of experimentation can ever prove me right; a single experiment can prove me wrong. 
Albert Einstein 

Science investigates religion interprets. Science gives man knowledge which is power religion gives man wisdom which is control. 
Martin Luther King, Jr. 

Bad times have a scientific value. These are occasions a good learner would not miss. 
Ralph Waldo Emerson 

The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...' 
Isaac Asimov 

A scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it. 
Max Planck 

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom. 
Isaac Asimov 

Touch a scientist and you touch a child. 
Ray Bradbury 

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young. 
Konrad Lorenz 

Each problem that I solved became a rule, which served afterwards to solve other problems. 
Rene Descartes 

The best scientist is open to experience and begins with romance - the idea that anything is possible. 
Ray Bradbury 

A fact is a simple statement that everyone believes. It is innocent, unless found guilty. A hypothesis is a novel suggestion that no one wants to believe. It is guilty, until found effective. 
Edward Teller 

The scientific theory I like best is that the rings of Saturn are composed entirely of lost airline luggage. 
Mark Russell 

Science does not know its debt to imagination. 
Ralph Waldo Emerson 

Science is a way of thinking much more than it is a body of knowledge. 
Carl Sagan 

Your theory is crazy, but it's not crazy enough to be true. 
Niels Bohr 

Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: 'Ye must have faith.' 
Max Planck 

Men love to wonder, and that is the seed of science. 
Ralph Waldo Emerson 

Science never solves a problem without creating ten more. 
George Bernard Shaw 

If a man's wit be wandering, let him study the mathematics. 
Francis Bacon 

Research is what I'm doing when I don't know what I'm doing. 
Wernher von Braun 

A year spent in artificial intelligence is enough to make one believe in God. 
Alan Perlis 

Few tragedies can be more extensive than the stunting of life, few injustices deeper than the denial of an opportunity to strive or even to hope, by a limit imposed from without, but falsely identified as lying within. 
Stephen Jay Gould 

Read more at http://www.brainyquote.com/quotes/topics/topic_science.html#LoK34Eq0XFM4oMlx.99