This Week: Death of the mastadon
In the News: Antarctic ozone hole: 10th largest on record!
Coming Thursday: Return of the wild: Coyotes, bears and turkeys are back!
In 1997, Dolly was BIG NEWS. What did Dolly teach? Why did cloning attract so many oddballs, and what is the status of reproductive cloning and therapeutic cloning? The Why Files honors Dolly with a 10-year lookback.
Want to make alternative fuel? Need to get electricity directly from organic slop? Bacteria may have the perfect answer.
How do dragonflies fly? How do bats catch insects hidden behind leaves? How do you make a temperature of 2 billion degrees? Why would anyone care?
How does an atomic clock work? How does an atomic fountain work? Is there a limit to the accuracy of an atomic clock?
Old museum collection sheds light on vanishing land snails of Polynesia.
Bigfoot film was a fraud, a hoax, says man who played bigfoot in 1967 film. Why do so many people believe in cryptozoology?
Edward Teller helped invent the hydrogen bomb, then pushed missile defense. By public advocacy and secret research, he changed the 20th century.