Earth's shape can be tested in surprisingly simple ways without relying on space photographs. The strongest part of the evidence is how many independent observations lead to the same answer.

During Earth’s early days, a gargantuan collision left our planet spinning at an angle. That slight incline allowed life as ...

More than 2,000 years ago, pretty much every educated human knew the Earth was round. There are some pretty obvious clues, after all. If you travel south, you see stars and constellations you’ve never ...

Flat Earth theory can be tested without relying on space photographs or one institution. Several independent observations ...

The location of Earth's geographic poles has changed several times over the past 320 million years in a process known as true ...