[Vinnie]

Or populated S. America when it was connected to Africa. Rode over on the continent.

Unless the climate in N. Siberia and Alaska was very different than now, I can’t see some of these animals surviving the winters during a migration across the ‘land bridge’.

[maine-iac7]

Rode over on the continent.

That's a great phrase! And, I imagine, scientifically valid

[wolfcreek]

“Unless the climate in N. Siberia and Alaska was very different than now”

It was very different.

http://www.upenn.edu/pennnews/current/1999/090299/Arctic.html

[maine-iac7]

Vinnie - forgot to include you in my answer to our mutual poster, blam =

he/she said to us: "That was 120 million years ago.

And I answered: "yeah - and the same 'building blocks' would've 'rode over' as stayed put, would they not?"