Birds fly more efficiently by folding their wings during the upstroke, according to a recent study. The results could mean that wing-folding is the next step in increasing the propulsive and ...

Foldy Bird is a brilliant take on the deeply-twisted Flappy Bird and, provided you've got a foldable phone, you can play it right now.

Panels A and B show the side-on and underneath view of a hummingbird passing through an aperture sideways. C and D show the same views of the hummingbird passing thorough an aperture like a bullet ...

Birds fly more efficiently by folding their wings during the upstroke, according to a recent study led by Lund University in Sweden. The results could mean that wing-folding is the next step in ...