Just before they were fossilized, two tiny creatures left tracks showing how they may have moved. Results of an analysis of the tracks are taken as support for a particular view of vertebrate evolution.
机构:
George Washington Univ, Dept Anthropol, Ctr Adv Study Hominid Paleobiol, Washington, DC 20052 USAGeorge Washington Univ, Dept Anthropol, Ctr Adv Study Hominid Paleobiol, Washington, DC 20052 USA