During our month of “What Ifs,” we’ve gone from doubling Earth to halving the Sun to everyone trying to jump at the same time, and we’re wrapping things up back at ground level: What if the ...

Here's a fun fact: According to the United States Geological Survey, every single continent on the planet was once a single, comprehensive landmass known as Pangea. Pangea existed as it did for about ...

V. 1. Wegener and the early debate -- v. 2. Paleomagnetism and confirmation of drift -- v. 3. Introduction of seafloor spreading -- v. 4. Evolution into plate tectonics "Resolution of the sixty year ...