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 bird diversity. 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. More »

Freeloading: Secret of bird flight

Freeloading: Secret of bird flight
By carefully measuring the position of trailing birds, scientists detect a strong preference for the exact spot where their wings are More »