Physiology

Anglerfish have invisible fangs, narwhal tusks are extra-long canines, and more facts from the weird and wonderful study of teeth will astound you

A small study of people with congenital anosmia found changes in breathing that suggest the condition may affect more than just the ability to smell

Snot is one of the immune system’s efforts to ditch a virus, but how much we produce when sick is a slippery subject

The amount of water and electrolytes needed for proper hydration vary from person to person

When scientists exposed people to the virus that causes COVID, only a subset got sick. Studying them could offer clues to immunity

People whose eyes dilated more performed better on tests of working memory

The skeletons of scribes from ancient Egypt show deterioration from sitting and kneeling

A Doctor Who superfan explains how the unusual cardiovascular system of the alien Time Lords could evolve and function

Uncontrollable sobbing is uniquely human, and it may be our emotions running out of our faces, a way to connect us with other people

Experts explain how moving in reverse can take pressure off your knees and improve flexibility

When the moon fully eclipses the sun, it’s not just the sky that changes. Your eyes do, too

The humble vacuole, a garbage dump inside cells, turns out to play an important role in the aging process