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Posted 2 days ago by Jagerbomb in category: animals   Comments (3)


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Posted 6 days ago by boyt in category: interesting   Comments (0)


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Demonstration of an optical technique that allows us to see small changes in the index of refraction in air. A point source of light is reflected from a concave mirror and focused onto the edge of a razor blade, which is mounted in front of the camera. Light refracted near the mirror and intercepted by the blade gives the illusion of a shadow.Seen here are the heated gases from a candle flame and a hair dryer, helium gas, and sulfur hexafluoride gas.
Posted 2 days ago by Mamok in category: interesting   Comments (0)



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"The night-time economy is not all about bad lads doing bad things," says the council in Boston, Lincolnshire, after CCTV captures a group on a night out at 3am fixing a bike rack damaged by a car.
Posted 1 day ago by boyt in category: fascinating   Comments (0)


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Posted 2 days ago by StiflersMom in category: beautiful   Comments (0)