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Do Whales and Dolphins see Blue?
Dolphins and whales live in the deep blue sea, but strangely these animals are not able to see the colour blue! Leo Peichl of the Max Planck Institute for Brain Research in Frankfurt and his colleagues discovered during routine tests that seals do not respond to the blue colour. Intrigued, they carried out similar tests on few other species, such as dolphins and whales, and found the same results. According to fossil evidence, whales are believed to have descended from a four-legged primitive ungulate (hoofed mammal) which lived on land and was similar to the modern day hippopotamus....
The Earth Is Getting dimmer
If you have viewed a crescent moon on a clear night, you would have observed an eerie glow around the moon. This is called earthshine. Do you know why the moon glows? The eerie glow around a crescent moon is called earthshine. Our earth and the moon act as giant mirrors that reflect sunlight. Actually most objects reflect light. A mirror reflects almost all the light that falls on it. And an object that does not reflect light is called opaque....
The Fossil Tree
December 27: Which are the oldest living trees in the world? You might think it’s those huge redwood trees, called giant sequoias, dating 4000 years. Not true. How about the Wollemi Pine? Yes, you’re getting there. But the answer is the Nightcap Oak, which was discovered recently. This oldest tree is 90 million years old. The Nightcap Oak has been identified as a living fossil. It dates back to millions of years and was thought to have died out....
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