Eurasian jays pass a test of theory of mind, showing they understand that other birds have different desires and beliefs. Based on what they'd observed, male jays knew what food their mates would want.
Loggerhead sea turtles are master navigators, covering thousands of miles of open ocean during their lifetimes. But it all begins with a scramble to the sea immediately after hatching. Newborn turtles must find the ocean and set a bearing to the open sea. This perilous journey, upon which their life depends, requires several sophisticated sensory systems.
Eight arms, a soft body, excellent vision - and a huge brain - make octopuses unique in the animal kingdom. Meet a scientist who is trying to decipher the behavior of these fundamentally alien creatures by testing them on their own terms.
It's easy to overlook a seal's whiskers when faced with those puppy—dog eyes and smiling snout. But it's those vibration—sensitive whiskers that are the secret weapon in the seal's tracking arsenal, helping them to find and chase prey that they can't see or hear.