Because of such technological marvels as Google Maps (and the many volumes of Where's Waldo? ), you'd think that every inch of planet Earth has been thoroughly documented by this point. But the truth is, science pulls mind-blowing finds out of its cavernous, all-knowing ass more or less every 15 minutes. Here are four amazing discoveries that just occurred while the rest of civilization was bingeing on Teen Mom and waffle tacos .

4 NASA Finds the World's Longest Canyon Beneath Greenland

Even if you didn't sleep through your elementary school geography lessons, you probably have an inkling that Greenland is 75 percent covered in ice. But what you didn't know was that tucked underneath all that ice sits the longest canyon in the world.