10 Unsolved Historical Mysteries That Still Confuse Experts

7. The Dendera Light Mystery

In an Egyptian temple, carvings show shapes that look exactly like giant light bulbs. Inside these “bulbs,” there are snake-like designs that look like electric wires.

Did the ancient Egyptians really know how to make electricity? Or is it just a religious symbol? We still don’t know, but the carvings sure look suspicious.