These horned lizards turn their lunch into a loaded weapon - then fire the leftovers straight from its own eyeballs.

Two unrelated groups of nectar eaters, hummingbirds and sunbirds, have evolved different techniques to slurp the sweet liquid ...

While we often think of hummingbirds as sucking nectar from flowers, they're not sucking the way we suction juice through a ...

People who spend hours underwater have developed extreme physical adaptations to survive, according to a new study.

Capybaras, the world’s largest rodents, share South American waterways with caimans without regularly becoming prey.

REM (rapid eye movement) and non-REM (NREM) sleep stages contribute to systems memory consolidation in hippocampal-cortical circuits. However, the physiological mechanisms underlying REM memory ...

The two hemispheres of the brain are neither structurally nor functionally symmetrical, and these asymmetries are often reflected in behavior. For more than ...

Challenging the classic view, two cognitive scientists argue in a new review that categorization is not a late, specialized ...