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Science Corner: May 2012 Archives

The downside of walking upright

Bob Fournier explains the disadvantages that came with the evolution of walking upright.

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When you photograph a person with a flash, you might get 'red eye' but if photograph your dog, you might get 'blue eye'. Why is that?


Human eyes dilate in dim light so the flash from the camera hits the retina, which is full of blood vessels and reflects red. Most dogs have a layer of crystals at the back of their eyes which reflect green or blue.

Bob Fournier dives into the north sea to talk about bio-diversity

We find out why microbes are so important in the grand scheme of the Earth's ecosystem.

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