Ancient Egyptian Pharaoh Necho II might have been the first to challenge the “flat earth theory” when he hired Phoenician sailors to circumnavigate Africa, Mark Oliver writes for Ancient Origins. The crew sailed around Africa some 2600 years ago to find an alternate route to the straits of Gibraltar. Legend has it that they returned home with news that the sun seemed to change position as they reached the tip of Africa, challenging long-held beliefs of a flat earth and being the first known people to propose the idea.