[Junior]

Nothing quite so esoteric. The oxygen levels during the Carbiniferous Age were a tad bit higher than today, allowing large insects to exist. Gigantic land animals existed pert near up to 15k years ago (the dinosaurs were not nature's only experiment with big beasties -- some land mammals rivaled some of the sauropods in size) when there was a massive die-off of most terrestrial megafauna (anything over 45kg). The animal kingdom hasn't quite recovered from that die off just yet.

[BMCDA]

Now, here's Velikovsky... but where's medved?

[WyldKard]

Actually, I hear there are places in Sibera where the Wooly Mamoths were still alive, about 4K years ago....that would have been cool to see...