Unforgettable Facts You Didn’t Know

“Did you know octopuses have three hearts—and blue blood? Two of those hearts pump blood to the

gills, and one pumps it to the rest of the body. Did you know bananas

are actually berries, but strawberries aren’t? Did you know humans actually glow?

Our bodies emit light because of chemical reactions in our cells—but it’s too faint for

our eyes to see. Did you know sharks existed before trees? Sharks have been around for over

400 million years, long before forests existed. Did you know the Eiffel Tower grows

about six inches in the summer? Metal expands when it heats up—so yes, it literally gets

taller. Did you know your stomach replaces its lining every three to four days?