Mammoths roamed the northern hemisphere until they abruptly disappeared. The extinction of these highly social mammals has initiated many opposing theories. Contrary to previous speculation, they may not have died out with the Ice Age. It seems the last woolly mammoths were still on Earth when the pyramids were built and recent research suggests a human virus may have wiped out this species.
This week The Edge travels to the rainforests of China and to the National Institute of Health in Bethesda in the United States to investigate venomous tree frogs, creatures which appear to contain natural antibiotics and fungicides capable of fighting diseases in humans.
Star Movies, 9pm
Set in April 1942, Hitler's U-boats have brought World War II to the United States. Unknown to the American public, Allied shipping losses are mounting on the Eastern Seaboard. Unable to crack the U-boat radio codes, the US Navy launches a daring mission to capture a top-secret Nazi coding device from a German submarine and turn the tide of the conflict.
U-571 won an Oscar for best sound effects editing and was inspired by a composite of events that transpired during the Battle of the Atlantic. Starring Matthew McConaughey, Bill Paxton, Harvey Keitel and Jon Bon Jovi (above). (2000)