The notion of a Jurassic Park has always been *around the bend*, if you take my meaning. :') Without a time machine, we won't be seeing live dinos. My guess is, the Jurassic period probably had a comprehensive lizard funk that was hard to take.
Wow...You must study this subject quite a bit...I know little about that time period...
I was just attempting to be funny...
Thanks for all the links....
The real reason mammals of the day lived in burrows.