Digital X-rays of Lucy, the skeletal remains of a human who lived 3 million years ago, could provide answers about how our ancestors began walking, said scientists at the University of Texas in Austin on Friday.

New creatures found in Ethiopian fossil deposits Scientists get clues to evolution of mammals By SUSANNE QUICK squick@journalsentinel.com, Journal Sentinel Monday, December 8, 2003 While lions, tigers and bears were evolving in the Northern Hemisphere, between 24 million and 32 million years ago, an odd assortment of creatures, including primitive elephants, hyraxes and horned rhino-like species, were doing the same in the south -- or so it was assumed.