A shark's snout is dotted with jelly-filled pores called ampullae of Lorenzini. These sensors pick up electric fields of just a few billionths of a volt per centimeter, like those produced by the muscle contractions of a fish buried in sand. Even without seeing or smelling its prey, a shark can home in on it during the final moments of an attack.
In 2022, a young tagged bar-tailed godwit flew from Alaska to Tasmania in about 11 days of nonstop flight, covering 13,560 km without eating, drinking or landing. Before departure, these birds pile on huge fat reserves and shrink their digestive organs, which are useless during the journey.
To escape rivals, a dung beetle rolls its ball of dung in a straight line. At night, it holds its course using the glowing band of the Milky Way. In a planetarium, researchers showed that beetles rolled straight under a starry sky but wandered aimlessly when the galaxy was switched off. It was the first animal known to navigate this way.