Apr 26, 2009 4:00 AM EDT
Amazing Race 148 pm/ET CBSThe race is down to its final four teams as the pairs continue to compete in China. Lakisha and Jen battled physically and v… Read more
Documenting the forensic investigation of a remarkably well-preserved woolly mammoth calf, which was discovered on a riverbank in northwestern Siberia in May 2007. The species has been extinct since the last ice age.
Premiered: April 26, 2009