The dark, smudgy streaks on Xavi Bou's photographs suggest the jerky ink tracks created by a malfunctioning printer, but they actually record the various patterns birds trace while flying in flocks.

Flight is truly remarkable, no matter which way you look at it. And while it seems easy enough for the tiniest insects to ...

Wind turbines rarely stay unnoticed in open landscapes. They move constantly, casting shifting shadows across fields and ...