Dozens of companies invite consumers to spit in a tube to determine which antidepressant is right for them. There's little evidence that these tests work.
A concentration of plasma in the Earth's atmosphere, called the ionosphere, interacts with solar winds, ultraviolet radiation and radio waves.
Thousands of people claim to experience trypophobia, or a fear of clustered holes, but science hasn't settled on the origin of their fear.
From ancient Greece to the age of quantum computers, cryptography continues to keep our secrets safe.
Sleep paralysis can be a confusing, frightening and occasionally pleasant experience — and it's more common than you might think!
The sympathetic nervous system activates the "fight-or-flight" response, quickly readying the body to handle dangerous or stressful situations.
Lionfish are known for their breathtaking beauty, venomous sting and relentless invasion of tropical waters far from their native habitat.