What to know for the total solar eclipse: Time, path of totality, eclipse glasses

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. CNN  —  Sky-gazers across North America are in for a treat on April 8 when a total solar eclipse will pass over Mexico, the United States and Canada. The event will be visible to millions — including 32 million […]

How to Convince Your Flat-Earth Friends the Earth Is Round

Illustration: Rhett Allain You can see that we have a right triangle with the hypotenuse equal to the distance from the observer’s eyes to the center of the Earth (R + h), with the other two sides being just R and the distance to the horizon (s). Using the Pythagorean theorem, we can solve for […]