[ThePythonicCow]

He lived on a planet with a huge polar aligned tidal force opposing the pull of gravity as his planet orbited around a large gravity producing mass.

That one seems unlikely to me, but what do I know.

Changing the earth's rotation rate is kinda easy, if you can change its diameter.

There is intriguing geological evidence that the earth's diameter was quite a bit smaller at one time. If that was the case, it -would- have been smaller, hence rotating faster, hence supporting more massive land animals.

[Swordmaker]

There is intriguing geological evidence that the earth's diameter was quite a bit smaller at one time. If that was the case, it -would- have been smaller, hence rotating faster, hence supporting more massive land animals.

The same intriguing geological evidence exists for a egg shaped planet with the majority of the landmass on the smaller diameter point of the egg. The Sea of Tethys disappears from Pangea when it is placed on the smaller end of the egg shaped Earth that is formed by a constant tidal pull of a large gravity source.