Monday, December 31, 2012

Fact of the Day: DNA's Memory

While life has been evolving for eons, old traits can reappear after being absent when one species evolved into another. This is called an atavism, and it's commonly nicknamed "an evolutionary throw-back". For example in extremely rare cases biologists have discovered hind legs in whales, hind fins in dolphins, extra toes on horses, and teeth in chickens. An example found in humans are vestigial tails, and large teeth. 

7 comments:

  1. That is actually pretty fascinating. And it describes the brains of several people I have met ;)

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  2. Interesting - learn something new everyday :D.

    Happy New Year Adam, Evelyn

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  3. one of the greatest wonder of life

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  4. Maybe we get hind legs in some newer generation too :) although I wouldn't mind me some wings....

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  5. yeah i have some of those traits

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