The People's Evolution - London, United Kingdom - Organisation non gouvernementale (ONG) BBC Почему мы видим сны Odyssey.js Scroll Plymouth Sound, England A nautical chronometer made by Thomas Earnshaw (1749–1828), and once part of the equipment of HMS Beagle The morning of 27 December, the Beagle left its anchorage in the Barn Pool, under Mount Edgecumbe on the west side of Plymouth Sound and set out on its surveying expedition. St. Jago, Cape Verde Islands modern day Praia It is here that Darwin's description in his published Journal begins. Bahia, Brazil modern day Salvador Due to heavy surf they only stayed at Fernando de Noronha for a day to make the required observations, and Fitzroy decided to make for Bahia, Brazil, to rate the chronometers and take on water. Uruguay Cerro de Montevideo as seen from the city, in 1865. After storms, the Beagle reached Montevideo on 26 July 1832, and took observations for the chronometers. Much of the second day was taken up with excavating a large skull which Darwin found embedded in soft rock, and seemed to him to be allied to the rhinoceros. southern tip of South America Australia
10000 лет назад. Следы Богов. Артефакты. World's Tallest Waterslide: Why You Don't Fall Off Standing taller than Niagara Falls, a new waterslide — appropriately named Verrückt, which means "insane" in German — opened on Thursday (July 10) in Kansas City, Kansas. The slide stands 168 feet 7 inches (about 51 meters) tall, and is now officially recognized by Guinness World Records as the tallest waterslide in the world. After the first 17-story drop at a 60-degree angle, riders swoop up a hill, before plunging down a 60-foot (18 m) drop and landing safely in a splash pool. A rider's raft reaches speeds of about 65 mph (29 m/s), and the entire harrowing ride lasts all of 10 seconds. The ride was originally scheduled to open on Memorial Day, but the rafts kept flying off the chute during test runs. So what does it take to keep a raft from picking up too much speed and separating from the chute? It's all about the relationship among gravity, friction and the steepness of the slide, said Gene Van Buren, a physicist at Brookhaven National Laboratory in New York. Is it safe?
То , что от нас скрывали (Часть 2) Water tractor beam created by Australian scientists in world first Updated Australian scientists have created the world's first water tractor beam which they hope can be used to clean up oil spills. Physicists at the Australian National University have created certain wave patterns in water that pull objects on the surface towards the source of the waves. It is hoped the tractor beam would be developed to assist in removing objects adrift on the surface of the ocean. Dr Horst Punzmann is part of the team behind the design. "A tractor beam is a popular term which, I think it captures quite well the basic principle," he said. "You put an object there and it propagates, it floats backwards to the source of the wave." However, the physicists had been doubtful at first. "First I thought it was impossible and I thought that it was the effect of the boundaries nearby," said Professor Michael Shats, a colleague of Dr Punzmann. "So the first idea was to build a bigger tank. Despite this, the scientists have admitted they did not fully understand how it worked.
То, что от нас скрывали (Часть 3) Ice cube experiment › Tricks (ABC Science) The Surfing Scientist › Tricks This classic experiment shows how ice can weld itself together. It was first performed in 1872, but we still don't know precisely how the phenomenon works. By Ruben Meerman Can't see the video? Ice can melt under pressure and it will refreeze when the pressure is reduced, but while that is all easy enough to say, the science behind it is tricky. ^ to top What's going on? The phenomenon you are witnessing is called 'regelation'. The presence of the wire melts the ice below it and the water above refreezes above. Melting, freezing and the solid state of water are much more complicated than most of us think. For starters, did you know there are at least eleven different types of ice? A standard, garden-variety ice Ih cube floats in your drink because its volume is about 10 per cent greater than the liquid it was made from. This unusual property of ice Ih is due to the boomerang shape of water molecules, which underlies the gorgeous hexagonal shapes of snowflakes.