1. Bananas Are Radioactive (But Don’t Panic)

Bananas contain potassium-40, a naturally occurring isotope that makes them slightly radioactive. But before you swear off smoothies, know this: you’d have to eat millions of bananas in one sitting to be at any risk. Still, it’s wild to think that your breakfast might be giving off tiny doses of radiation—just one of nature’s odd little quirks.

2. You’re Mostly Made of Empty Space

The atoms that make up your body are 99.9999999% empty space. The nucleus is tiny compared to the full atom, and electrons orbit so far out that, proportionally, you’re more "nothing" than "something."