Paddlefish, also known as spoonbill catfish, are cartilaginous fish that inhabit freshwater lakes. They only like to feed on plankton, a category of aquatic food that includes tiny crustaceans like brine shrimp and water fleas. Paddlefish hunt using sensors on their paddle, or nose, that guide them right to their small prey.

Which is more complex—a typical man walking across a street, or a blind man carrying a legless man across the street?

On January 11, Google celebrated the 374th birthday of Nicolaus Steno by featuring a colorful doodle of rock layers on its homepage.¹

The evolutionary history of certain extinct marine reptiles just got rewritten.