Interesting view of Ayn Rand

For anyone who saw my post pointing to Ayn Rand's Buffy The Vampire Slayer and wasn't clear on who Rand was...

Extinct animals

Mentioning Prehistoric Park has given me an idea for some fanfic, but it needs a land animal that went extinct say 5000-10000 years ago, somewhere with a hot or desert climate, and would be interesting enough for a time-travelling zoo to want some. Any suggestions?