> However, when you go back to the most recent ice
> age you had oversized sloths, buffalo, wolves,
> lions, etc... so why not oversized people? The big
> question is why were they oversized? Was the moon
> closer to the Earth at the time, decreasing the
> Earths gravitational effects? Diet? If there were
> giants, as so many ancient cultures have
> indicated, what would cause this "largeness"?
Most mammals are small to smaller. Larger animals during the ice age had an advantage: they were better able to conserve body heat. Notice they all died out as the climate warmed and they couldn't adapt fast enough.
Nowadays the polar bear is the largest land predator on Earth. It's much larger than the bears in the southern regions. The southern elephant seal is the largest marine predator (males weigh upwards of 9,000 pounds), and it lives in the regions around Antarctica.