Posted: Tue Mar 17, 2009 9:12 am Post subject:
Why are land/sea animals much smaller than prehistoric ones?
My question is why are animals of sea and land so much smaller than animals that lived millions of years ago.
I mean scientist have found fossils and skeletal remains of similar animals that exist today but are much smaller in comparison, like ridiculously smaller.
For example, the Great White Shark. Its ancestor is called Megalodon.
They say an adult Great White Shark would just be the size of an adolescent Megalodon. This would mean an adult Megalodon would be double or three times the size of a modern Great White Shark. This applies to most animals too. Which comes back to my question.
Why are animals these days much smaller compared to animals millions of years ago?
fyi: I've read its because of the atmosphere. Hundreds of millions of years ago, the atmosphere was more dense with oxygen and other compounds. This would mean animals breathed in more oxygen and had larger hearts, lungs and basically a larger ass. But yeah, any thoughts would be awesome, laters!
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