The human body contains enough fat to make seven bars of soap. Embryos develop fingerprints three months after conception. Between birth and death, the human body goes from having 300 bones, to just 206. Hearts can beat outside of their bodies. When you blush, the inside of your stomach does too. Humans have a “diving reflex” that shuts down bodily functions when submerged in water to prevent drowning. There are certain kinds of tumors that can grow their own teeth and hair – they’re called teratomas. Astronauts can grow up to two inches taller in space. In cases of extreme starvation, the brain will begin to eat itself. When listening to music, your heartbeat will sync with the rhythm. The small intestine is roughly 23 feet long. One quarter of your bones are in your feet. Every organ you have two of, you only need one of to survive. There are more than 100,000 miles of blood vessels in your body. Pregnancy brain” is totally real – Women’s brains actually shrink during pregnancy. If you smoothed out all of the wrinkles in your brain, it would lay flat the size of a pillowcase. Stomach acid can dissolve metal. If it touched your skin, it would burn right through it. At some point, you may have fought cancer. Tongue prints are as unique as fingerprints. Humans shed about 600,000 particles of skin every hour. Babies only blink once or twice a minute, while adults average 10 times a minute. While awake, your brain produces enough electricity to light a lightbulb. In camera terms, the human eye is about 576 megapixels. The highest recorded fever ever was 115 degrees Fahrenheit 50 percent of your hand strength comesfrom your pinky finger. Cornflakes have more genes than people do. You might feel like you got a workout, but sex only burns about 3.6 calories a minute. The scientific name for stomach growls is “borborygmus.”