Hold both arms straight out in front of you and make a small triangle between your thumbs and forefingers, about the size of a coin.
Keeping both eyes open, move…
Almost every bone in the body is connected to other bones. It meets them at joints, it is held by ligaments running bone to bone, and its position is fixed…
The common description is that a scab is blood that has dried, and that is close enough to be misleading. If you leave a drop of blood on a table…
The thing has a formal description in the research literature, which translates roughly as short-lived abdominal pain related to exercise. The word stitch is the one everybody actually uses.
The…
Goosebumps are among the strangest things the human body does routinely. A sensation arrives — cold air, a piece of music, someone's fingertips on the back of your neck —…
Hiccups are so ordinary that almost nobody asks what they are for. Everyone gets them, they arrive unbidden, they are mildly annoying, and they go away.
But consider what is…