Failure to croak

摘要

AROUND 66m years ago Earth collided with a space rock so large that it punched a crater more than 180km across in the area now known as the Yucatan peninsula, in southern Mexico. This collision did for the dinosaurs and many other sorts of animal besides. It thus wiped much of the ecological slate clean, permitting the survivors-those that did not, as it were, croak in the impact's aftermath-to strut their evolutionary stuff unconstrained.