SpaceScientists calculated the average color of all light in the observable universe. It's a beige shade officially named "Cosmic Latte." The universe used to be bluer when it was younger—it's slowly getting more red as stars age and die.5
NatureOctopuses have three hearts—two pump blood to the gills, one pumps it to the body. Their blood is blue because it uses copper-based hemocyanin instead of iron. Each of their 8 arms has its own mini-brain that can act independently—an arm can "decide" to open a jar while the central brain focuses on something else.3
