Where, oh where, has the road kill gone?
Tuesday, March 19, 2013 - 15:00
in Physics & Chemistry
Millions of birds die in the US each year as they collide with moving vehicles, but things have been looking up, at least in the case of cliff swallows. Today's swallows are hit less often, thanks to shorter wingspans that may help them take off more quickly and pivot away from passing cars.