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Preschoolers demonstrate humankind's social-learning prowess Web edition : Thursday, March 1st, 2012 Preschool kids angling for a reward display social skills that may, on a grander scale, turn human cultures into cauldrons of change and innovation.

For more information on this amazing robot here is another link: http://www.herts.ac.uk/news-and-events/latest-news/KASPAR-autism-robot-to-appear-at-Royal-Society.cfm

When volcanoes erupt, they can release ash, chunks of rock and torrents of lava. Now scientists have found that eruptions also can spew massive amounts of a chemical called bromine. This gas helps destroy the ozone layer, a segment of the upper atmosphere that protects life on Earth from the sun's harmful ultraviolet rays.

Flying predators probably gobbled up the biggest of the large flying insects 150 million years ago About 300 million years ago, long before the first dinosaurs appeared, a different type of oversized critter inhabited Earth: giant insects. Scientists suspect bugs grew bigger then because the atmosphere contained more oxygen than it does now.

Sugar-free sweeteners fool the body's internal computer Diet soft drinks usually have no sugar, but that doesn't mean they're not sweet. These beverages often contain ingredients that mimic sugar's sweetness without the big calorie count. In a new study, psychologists from San Diego report that the sugar-free sweeteners confuse not only taste buds but also the brain.

If aliens ever sent us a message, scientists hope to pick it up in a remote part of northern California. There, in a clearing nestled amid the volcanoes of the Cascade Range, 42 radio dishes point together at the sky. The dishes, each 20 feet across, form a single, giant scientific instrument called the Allen Telescope Array.

If you were to trace human evolution backward in time and space, you'd eventually end up in Africa. There, millions of years ago, animal species evolved to walk upright on two legs and spend more of their lives on the ground than in the trees.