In a move reflective of a viral meme, a new study shows that an ancient fish really did evolve to walk out of the water, only to then go back to the sea.

The newest bewildering-but-awesome meme craze is "fish tube," aka the salmon cannon, and it ran wild over the weekend. Seen the fish tube online and don't know what to make of it? We have your back.

You may have come across a meme showing an ancient fish known as Tiktaalik. It shows the green, eel-like creature crawling out of the sea about 375 million years ago — about the time that scientists ...