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Johnathan Fletcher

YouTube - Bill Nye - Greatest Discoveries - 3: Chemistry - 0 views

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    Host Bill Nye looks back over the past two centuries, in which chemistry has brought us from a time when atoms were a hypothesis to an age where scientists may be able to combine particles on the atomic level into micro-machines. Learn how electricity transforms chemicals, elements can combine into more complex molecules, and the combination of nonliving substances produced organic compounds that led to pharmacology. Nye examines the second half of the 19th century, a time dominated by discoveries relating to light, electrons, radioactivity, and the periodic table of the elements as well as 20th century advances in science.
Johnathan Fletcher

YouTube - Time Travel - Einstein's Big Idea - Theory of Relativity - 0 views

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    Time Travel - Einstein's Big Idea - Theory of Relativity
Johnathan Fletcher

BBC News - Boom and bust signals ecosystem collapse - 1 views

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    "In particular, rapid swings in the density of plants and fleas indicated the food web was unstable and about to change. The idea that such early warning signals ought to exist is not new - but the researchers say this is the first time it has been demonstrated experimentally. "For a long time, ecologists thought these changes couldn't be predicted," said research leader Stephen Carpenter from the University of Wisconsin in Madison, US. "But we've now shown that they can be foreseen. The early warning is clear; it is a strong signal.""
Johnathan Fletcher

Earth | Time Lapse View from Space | Fly Over | Nasa, ISS - YouTube - 1 views

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    "Time lapse sequences of photographs taken by the crew of expeditions 28 & 29 onboard the International Space Station from August to October, 2011, who to my knowledge shot these pictures at an altitude of around 350 km. " Shooting locations in order of appearance: 1. Aurora Borealis Pass over the United States at Night 2. Aurora Borealis and eastern United States at Night 3. Aurora Australis from Madagascar to southwest of Australia 4. Aurora Australis south of Australia 5. Northwest coast of United States to Central South America at Night 6. Aurora Australis from the Southern to the Northern Pacific Ocean 7. Halfway around the World 8. Night Pass over Central Africa and the Middle East 9. Evening Pass over the Sahara Desert and the Middle East 10. Pass over Canada and Central United States at Night 11. Pass over Southern California to Hudson Bay 12. Islands in the Philippine Sea at Night 13. Pass over Eastern Asia to Philippine Sea and Guam 14. Views of the Mideast at Night 15. Night Pass over Mediterranean Sea 16. Aurora Borealis and the United States at Night 17. Aurora Australis over Indian Ocean 18. Eastern Europe to Southeastern Asia at Night
Johnathan Fletcher

YouTube - Winter Solstice - Total Lunar Eclipse 2010 - TIME-LAPSE - 0 views

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    Winter Solstice - Total Lunar Eclipse 2010 - TIME-LAPSE Total eclipse on winter solstice. 4.5 hours shortened to a minute and thirty seconds.
Johnathan Fletcher

Viewpoints: Should we give up trying to save the panda? - 0 views

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    "A survey of about 600 scientists published this week found that a majority think it's time to consider conservation triage - focusing resources on animals that can realistically be saved, and giving up on the rest. Those that fall into the too-expensive-to-save category, it has been suggested, might include the panda and the tiger."
Johnathan Fletcher

BBC News - Metal undergoes novel transition under extreme pressure - 1 views

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    "A team at the Carnegie Institution for Science subjected the material to pressures up to 1.4 million times atmospheric pressure at sea level, and temperatures up to 2,200C. They found that it pulls off the trick of changing its electrical properties without any shifting of shape - it can be an insulator or conductor depending just on temperature and pressure. Combined with computer simulations of just what was going on with the material's electrons, the group claim that the results show a new type of metallisation. "At high temperatures, the atoms in iron oxide crystals are arranged with the same structure as common table salt," said Ronald Cohen, a co-author of the study. "Just like table salt, iron oxide at ambient conditions is a good insulator-it does not conduct electricity.""
Johnathan Fletcher

CBC Toronto | Features | Condos - 0 views

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    "Building scientists have known for a long time that glass-walled structures are less energy efficient than the stone and concrete buildings that were put up forty of fifty years ago. But the market demand for glass combined with the relatively low cost of glass-wall construction means the building industry has been happy to oblige."
Johnathan Fletcher

CBC Toronto | Features | Condos | Window Seals - 0 views

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    Throw-away Buildings Thermal Window Failure: How it Happens Virtually all glass condominium towers feature window wall systems (floor-to-ceiling walls of glass) enclosing the entire facade. Window walls yield spectacular views, but owners who buy a condo unit for the view may not realize that they're relying on a couple of panes of glass separated by less than an inch of insulated space to protect them from the elements. That insulated barrier will degrade over time, even as energy costs increase. On some buildings, five per cent of the thermal windows may have failed before they're even delivered to the construction site. Another 10 - 15 per cent will fail by the 20-year mark as they're exposed to the physics of heat expansion. By the 25 year-mark, a growing number will fail every year.
Johnathan Fletcher

BBC News - Leonardo da Vinci: How accurate were his anatomy drawings? - 1 views

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    "Anatomists such as Prof Peter Abrahams believe that Leonardo's work was some 300 years ahead of its time, and in some ways superior to what was available in the 19th Century Gray's Anatomy. They say it is only recently with 3D, digital technology and moving images that we have been able to take a decisive step beyond what Leonardo's hand and eye were able to achieve."
Johnathan Fletcher

British explorers discover world's largest cave deep in Vietnamese jungle | Mail Online - 0 views

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    "A British caving team believe they have discovered the world's largest cave passage in the heart of the Vietnamese jungle. The rocky passage is 150metres long and measures a towering 200metres in height - seven times as high as the vaulted ceiling of York Cathedral."
Johnathan Fletcher

BBC News - Experts rediscover plant presumed extinct for 60 years - 0 views

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    "This is actually the third extinct plant that Mr Stroud has rediscovered and, for him, it is an ongoing and very personal mission. "There's never a time that I'm not actually looking fort these species because, we say they're extinct, but I believe they are there," he said. "It's so satisfying, bringing a plant back from the brink of extinction.""
Johnathan Fletcher

BBC NEWS | Science & Environment | Arctic 'warmest in 2,000 years' - 0 views

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    Arctic temperatures are now higher than at any time in the last 2,000 years, research reveals. Changes to the Earth's orbit drove centuries of cooling, but temperatures rose fast in the last 100 years as human greenhouse gas emissions rose. Scientists took evidence from ice cores, tree rings and lake sediments.
Johnathan Fletcher

Time Dilation - An Experiment With Mu-Mesons | SciVee - 0 views

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    Created for scientists by scientists, SciVee provides synchronization tools and resources that connect science publications to media rich online video communication for scientific research communities.
Johnathan Fletcher

The Physics of Basketball - 0 views

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    A physical analysis of a player's movements, combined with a knowledge of the correct forces to apply at the right time, can be used to make a good player better. Scientific analysis like this is used in many sports, from figure skating to baseball
Johnathan Fletcher

Aerospace Technologies, Space Skydiving, High Altitude Balloon | Red Bull Stratos - 0 views

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    "Red Bull Stratos has enlisted the most advanced engineering and technology of our time. Advancements under development in each aspect of the mission aim toward an unprecedented achievement, and hold promise for future aerospace endeavors."
Johnathan Fletcher

Newly discovered planet may be first truly habitable exoplanet - UC Santa Cruz - 0 views

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    "A team of planet hunters led by astronomers at the University of California, Santa Cruz, and the Carnegie Institution of Washington has announced the discovery of an Earth-sized planet (three times the mass of Earth) orbiting a nearby star at a distance that places it squarely in the middle of the star's "habitable zone," where liquid water could exist on the planet's surface. If confirmed, this would be the most Earth-like exoplanet yet discovered and the first strong case for a potentially habitable one."
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