Although there are rival theories, it is widely believed that as forests
gave way to grassland, early hominids adapted by spending more time on their
two feet, and scavenging meat as well as gathering fruit and roots
<A HREF="http://news.bbc.co.uk/hi/english/sci/tech/newsid_1321000/1321867.stm">
Click here: BBC News | SCI/TECH | Climate change aids evolution</A>