Reality 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.

Forests have their own "Wood Wide Web"—a network of fungal threads connecting trees underground. Mother trees recognize their offspring and send them extra nutrients. Dying trees dump their resources into the network as a final gift to the forest.

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

Humans share about 25% of their protein-coding genes with bananas—the ancient "housekeeping" genes essential for all cellular life. You share 85% with mice, 96% with chimps, and surprisingly much with slugs. The genetic code of life is so conserved that we are essentially variations on a 4-billion-year-old theme.