Secrets of the sidewinder

Secrets of the sidewinder
The sidewinder rattlesnake winds sideways up hills that would defeat footed animals. A robot snake climbs a hill — returns some More »

Flying south for the winter?

Flying south for the winter?
A look at long-distance migration reveals surprising pattern. Migration did not originate in the tropics, home of intense bird More »

Meet the mosquito: Annoying, deadly

Meet the mosquito: Annoying, deadly

Malaria is declining slowly, but skeeters carry other diseases, including dengue and West Nile. How do mosquitoes reproduce? What are More »

Bats on the wing

Bats on the wing
Bat wings are built like a mammal’s arm—and so their flight is fiendishly complex. Scientists have decoded the fluid dynamics of the More »