If you've ever had a muscle seize up, you know it's painful and can stop you in your tracks. But what actually causes muscle cramps or spasms, and what can be done about it?
There are many different kinds of epilepsy with symptoms ranging from mild to potentially life-threatening.
The heart, lungs and about 60,000 miles of blood vessels work together to keep blood pumping through our bodies.
A concentration of plasma in the Earth's atmosphere, called the ionosphere, interacts with solar winds, ultraviolet radiation and radio waves.
Earth's first life forms consisted of simple prokaryotic cells. Over time, these evolved into the more complex eukaryotic cells with nuclei.
Thousands of people claim to experience trypophobia, or a fear of clustered holes, but science hasn't settled on the origin of their fear.
Albert Einstein was famous for many things, but his greatest brainchild is the theory of relativity. It forever changed our understanding of space and time.
A rare psychological occurrence, Stockholm syndrome is when hostages develop positive feelings toward their captors during an abduction incident.
If you know someone who enjoys cannabis, you've probably heard the letters 'CBD' thrown around lately. Short for cannabidiol, CBD is the focus of a new area of cannabis research.
The Chernobyl Nuclear Power Plant explosion resulted in the most horrific nuclear disaster in the world.
Alzheimer's disease, the most common form of dementia, causes memory and thinking problems, as well as behavioral changes in older adults.
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