Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy straightforward explanation. From the jut of the human chin to the curve of the outer ...

Few places on Earth — or in our bodies — seem to be free of microplastics. Researchers in recent months have announced the discovery of microplastics traveling in the bloodstream of a handful of ...

Science writer Mary Roach is fascinated by the human body, especially, she says, the "gooey bits and pieces of us that are performing miracles on a daily basis." Take the human heart, for instance. If ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Each human is a ...

An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...

July 2023 was the hottest month ever recorded. It could even be the hottest month in human history. That heat has tested the limits of our very bodies to tragic effect: In 2003, an estimated 70,000 ...

A baby's body has about 300 bones at birth. These eventually fuse to form the 206 bones that adults generally have, according to the Nemours Children's Health System. But no matter the age of an ...

It's wild to think that we've grown organs in labs, built robots that can perform surgery and started producing mind-controlled prosthetics but we still don't know exactly how anesthesia works. Or ...

Holly has a degree in Medical Biochemistry from the University of Leicester. Her scientific interests include genomics, personalized medicine, and bioethics.View full profile Holly has a degree in ...