Physics Facts

Due to general relativity, time passes very slightly faster for your head than your feet because your head is further from Earth's gravitational center. Over a 79-year lifetime, your head ages about 90 nanoseconds more than your feet.

If you removed all the empty space from the atoms in your body, you would fit into a cube less than 1/500th of a centimeter on each side. Every human on Earth could fit into a single sugar cube.

Electrons do not exist in any specific place until measured. Before observation, they exist as probability clouds. Reality requires witnesses.