The World’s Fastest Swimmers, Past and Present

World's fastest swimmers infographic

How does a dolphin measure up to a penguin when it comes to speed in the water? And can Michael Phelps take either of them?

What about a squid or a sailfish?

This infographic from Backyard Ocean takes a fun look at some of those comparisons, as well as great moments in water-crossing history.

Which fact surprises you the most?

Changing Planet