Calling all flat earthers. We're talking about the big rock we live on, planet Earth today. Back in ancient history, we have sacred texts and tablets with writings and drawings to show that some of those civilizations believe the Earth to be flat, and rightfully so. Every day, you see the sun rising in the east, the moon setting in the west, a big dome of stars above you, and if you're near water, you can practically see the drop-off on the water's edge. Around the 17th century is when science presented the idea of a spherical-shaped planet. So, if it's been that long, then what's with the modern-day flat Earth theory?