Some sequences in the genome cause genes to be switched on or off. Until now, each of these gene switches, or so-called enhancers, was thought to have its own place on the DNA.

Large wings are more difficult to flap and far less maneuverable, but they allow birds to fly with less effort. Common Murres have the highest known wing loading of any (flying) bird and must flap ...

Meanwhile, the pressure differential and resulting lift caused by the curved upper side of a bird’s wing highlights Bernoulli’s principle, which is also used in the design of aircraft wings. Not all ...