Jellyfish Brain
Jellyfish are among the most primitive animals alive today. Like their close relatives, sea anemones and corals, jellyfish have no head, no heart and no …
Hemoglobin – blood cells
Red blood cells make up nearly half our body’s blood volume. A healthy human produces about 2 million new red blood cells every minute. But …
The Sting
Wasps like yellow-jackets and hornets can sting over and over again. But bees can only sting once. We answer a listener’s question about bee stings. …
How We Read
In the U.S., most of us can read. But still very little is known about how our brains actually do it. Up next — a …
Brain Mapping
If you spread out your brain’s cerebral cortex, it’d be the size of a large pizza. It fits in your skull because it’s crumpled up. …
Chimp Talk
It was long thought that language was a uniquely human trait — a dividing line that separates humans from other primates. But does it? We …
Life on Europa
Scientists who search for life beyond Earth would love to analyze samples from distant planets and moons in the lab. They can’t do that yet …
Neutrino Discovery
The shy neutrino is an invisible, almost massless particle that hardly ever interacts with anything. We tell you how scientists first detected this so- called …