What Causes Traffic Jams?

It’s happened to all of us: we’re cruising down the freeway and suddenly find ourselves stuck in a thick jam of other cars. Where did they come from? What caused the traffic mess? Scientific American editor Larry Greenemeier explains.

Scientists have found that memories may be passed down through generations in our DNA

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New research from Emory University School of Medicine, in Atlanta, has shown that it is possible for some information to be inherited biologically through chemical changes that occur in DNA. During the tests they learned that that mice can pass on learned information about traumatic or stressful experiences – in this case a fear of the smell of cherry blossom – to subsequent generations.

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British scientists claim to have found proof of alien life

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A team of British scientists is convinced it has found proof of alien life, after it harvested strange particles from the edge of space.

The scientists sent a balloon 27km into the stratosphere, which came back carrying small biological organisms which they believe can only have originated from space.

Professor Milton Wainwright told The Independentthat he was “95 per cent convinced” that the organisms did not originate from earth.

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What is Color?

Have you ever wondered what color is? In this first installment of a series on light, Colm Kelleher describes the physics behind colors– why the colors we see are related to the period of motion and the frequency of waves.