This study presents the first physical evidence that Snowball Earth reached the heart of continents at the equator.' ...

Geologists found evidence in the way enigmatic sandstones called Tava formed in the Rocky Mountains hundreds of millions of ...

Nenad Lukic's Puzzlip generates free online puzzles. It divides an uploaded image into a grid and randomly rotates the squares. Click the squares to rotate them. It's funny because the copy describes ...