« 书写与权力 | Main | Whaling Musuem »

August 01, 2004

Ungulates

Whales, dolphins, and porpoises branched out from the group of animals called ungulates during the Paleocene period (57-67million years ago) and returned to the aquatic environment 50 million years ago. Our best guess is that they went back into the water to access rich food resources and to escape fierce competition on land.

Posted by Xiao at August 1, 2004 12:40 PM

Trackback Pings

TrackBack URL for this entry:
http://rockngo.org/cgi-bin/mt/mt-tb.cgi/236

Comments

Thanks for signing in, . Now you can comment. (sign out)

(If you haven't left a comment here before, you may need to be approved by the site owner before your comment will appear. Until then, it won't appear on the entry. Thanks for waiting.)


Remember me?