Bits of plastic smaller than five millimeters are called microplastics. They can end up in the ocean, where corals might mistake them for food.
Nematodes are a group of related small worms found all over the world. They can cause disease, but they also can be useful for scientists to study.
Sometimes populations of animals can suddenly increase. The word for that is irruption.
When lightning strikes in the right place, it can fuse minerals together in a glassy structure.
If you draw a representation of your body as seen by your brain, it’s called a homunculus. On it, parts sensitive to touch or used for fine movement are large, while others are small.
We often feel the pull of sleep when the sun goes down. Light and our own biology put us into a regular, 24-hour rhythm that has its own word.
Blood can contain nasty bacteria and other things you want to keep away from your delicate brain. The blood-brain barrier is up to the job.
We often see things that aren’t there, such as bunnies in clouds or faces in toast. They aren’t real, but they do have a special name
When a baby frog develops from an egg that’s never been fertilized, we call that parthenogenesis.
When water hovers in the air as fog and when bits of fat disperse in water as milk, they form a type of substance called a colloid.