As Earth's tectonic plates move across the planet's surface, the continents that sit atop them are carried along, sometimes smashing together for many millions of years at a time. As the ...

While the U.S. teaches that there are seven continents, Europe teaches that there are only six, with North and South America counting as one consolidated America. Some combine Europe and Asia into ...

First, there was zircon. It’s a common mineral in crustal rocks, “the rocks that form the continents, the things we all sort of walk on,” Johnson says.