The sympathetic nervous system was thought to have evolved with jawed vertebrates. But lampreys—jawless, parasitic fish that suck out the blood of their hosts—have a simple one, per recent research.

Crying: In humans, it is the production of tears usually accompanied by facial muscle contractions and vocal sounds. But what happens in the body during this ordinary occurrence, and what social ...

‘Hummmmm,’ I sing to myself as I exhale loudly. Then I take a big breath in, feel my ribcage expand and hum again. Next, my hands gently stroke my jaw and chin, then float to my forehead for more ...