Could the evolution of multicellular life have been fuelled by conflict among selective forces acting at different levels of organization?

The tunnelling of a bound electron out of an atom in a laser field is a well-known quantum-mechanical process. But it happens very quickly, and it takes some fast work with X-rays and lasers to see it in action.

The strange, slimy creatures called hagfishes are of abiding interest to students of vertebrate evolution: just where do they fit in? Investigations of hagfish development take the story forward.