A placozoan is a living sheet with no neurons, yet thousands of cilia can fold that sheet into changing forms.

A robot hand can have sensitive fingertips and still fail to notice an object pressing into its palm.

Seventeen rats learned that touching copper controls could steer a clear plastic vehicle toward cereal.

A robot lighter than a paperclip stores one burst in a springy leg and steers the hop with wing-like modules.

A seal's middle ear must transmit sound through air and water, two media that load the machinery very differently.

Camera traps found young male capuchins repeatedly carrying infants taken from another monkey species.

A four-centimeter silicone stingray flexed because ultrasound made bubbles inside its muscles respond.

A mudskipper does not pull an eyelid over the eye; it pulls the eye down into a wet cup.

A ball of active components changed its gait when rolling was no longer the useful way forward.

A dark naked mole-rat tunnel is crowded with squeaks, grunts, chirps, and colony-specific accents.