Science in Motion: Teaching Robots to Swim

The video discusses Madeline, an underwater robot designed to study aquatic animal swimming. Despite having four flippers, Madeline moves faster using only two, due to reduced turbulence. This finding aligns with the propulsion methods of marine animals like seals and penguins, which use two limbs. The insights can aid in designing efficient underwater vehicles.

Which marine creatures are mentioned as using only two limbs for propulsion?

What does the text suggest about the ancestors of modern marine creatures?