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Nature & Environment

Elephants grew over 24 million generations

By T.K. Randall
February 1, 2012 · Comment icon 14 comments

Image Credit: Sandra Fenley
Scientists have revealed that growing in size takes a lot longer for a species than shrinking in size.
It is thought that it took elephants more than 24 million generations to increase from the size of a mouse to the size they are today. Whales and other sea mammals took less time to grow due to their water-based environment. It is also thought that it takes a lot less time for a species to shrink in size by the same amount - as little as 100,000 generations.
Size change since the age of the dinosaurs 70 million years ago was tracked by generations rather than years to account for varying life spans between species.


Source: Telegraph | Comments (14)




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Recent comments on this story
Comment icon #5 Posted by ninjadude 13 years ago
how far back does creation theory go. What do you mean by creation theory? 1) The Evolution theory(S) attempt to explain the facts of evolution back to the initial changes from non-living to living. A very amorphous concept. 2) The theory of abiogenisis attempts to explain how a non-living thing can become living - some 3.5 billion years ago. 3) Creationism is not a scientific theory.
Comment icon #6 Posted by BaneSilvermoon 13 years ago
1) The Evolution theory(S) attempt to explain the facts of evolution back to the initial changes from non-living to living. I'm not sure a biological process should ever have non-living attached to it.
Comment icon #7 Posted by Aus Der Box Skeptisch 13 years ago
What do you mean by creation theory? 1) The Evolution theory(S) attempt to explain the facts of evolution back to the initial changes from non-living to living. A very amorphous concept. 2) The theory of abiogenisis attempts to explain how a non-living thing can become living - some 3.5 billion years ago. 3) Creationism is not a scientific theory. Lol I think it was a bit of levity
Comment icon #8 Posted by 27vet 13 years ago
We could extend that back to the first living cell, and for every organism on earth today. The big question is, did life on earth begin with the freak creation of one, or several cells, were they brought to earth from space...?
Comment icon #9 Posted by angi chiesa 13 years ago
Hey NINGA my post was a LOL LOL LOL. Creation theory is another lol as far as i am concerned. If life came from space ,how it originated is not solved by this idea.I still like the idea that I had a slimey start,explains a lot.
Comment icon #10 Posted by angi chiesa 13 years ago
I have just learned what LMAO means. Well AUS DER BOX it means lots of levity. Why is the elephant so small compared to previous life .And I ask you how many generations of SHREW has there been. Probably more than the elephant. Something screwy in this theory,dont you think.
Comment icon #11 Posted by BaneSilvermoon 13 years ago
I have just learned what LMAO means. Well AUS DER BOX it means lots of levity. Why is the elephant so small compared to previous life .And I ask you how many generations of SHREW has there been. Probably more than the elephant. Something screwy in this theory,dont you think. The article is no where suggesting that each generation makes a creature grow or shrink, so the number of generations of shrew is irrelevant. It's simply suggesting that, for a small creature to grow very large on average, it would take a huge number of generations, and that a large creature can become smaller in a much sh... [More]
Comment icon #12 Posted by ninjadude 13 years ago
Hey NINGA my post was a LOL LOL LOL. Then usually you post a smilie or actually say LOL in the post. You did neither.
Comment icon #13 Posted by 27vet 13 years ago
Obviously creatures with a short lifespan would have gone through more generations.
Comment icon #14 Posted by angi chiesa 13 years ago
Sorry NINJA LMAO...LMAO..LOL Dont know how to do smilies.I agree with you


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