Around 400 million years ago, fish left the water and started to evolve into land-loving creatures. But how did the transition happen? A new and unusual experiment could shed some light on the kinds of changes that enabled fins to become limbs. Researchers took a fish species known to be able to walk on its fins from time to time, and raised it on land. Watch the fish promenade in this Nature Video.

Read the paper: http://dx.doi.org/10.1038/nature13708

Read the News & Views: http://dx.doi.org/10.1038/nature13743