The “MuddyBot” robot — with two green "fins" and a powerful "tail" — uses the locomotion principles of the mudskipper to move through a trackway filled with granular materials. The “MuddyBot” robot — ...

HAYWARD, Calif. (Reuters) - Darting around the pool as a group of swimmers stands in the shallow end, the dolphin looks much like those that jump through hoops and perform acrobatics at theme parks.