We like to feel superior to the people who lived centuries ago, what with their shitty mud huts and curing colds by drilling a hole in their skulls. But we have to give them credit: They left behind some artifacts that have left the smartest of modern scientists scratching their heads.
For instance, you have the following enigmas that we believe were created for no other purpose than to f@#k with future generations.
via 6 Insane Discoveries That Science Can’t Explain | Cracked.com.