American businessman Elon Musk, founder of Tesla and SpaceX, has sparked widespread controversy after saying that aliens are the ones who built the pyramids in Egypt.

And Musk wrote on his page on the social networking site "Twitter", on Friday, saying: "Alien creatures built the pyramids."
After the tweet received many reactions and comments, Musk came back to comment on a new "tweet", saying: "Ramses II was wonderful," adding: "The Great Pyramid was the tallest structure made by humans in 3800 years."

And included in the tweet a link to the Wikipedia page about the Great Pyramid in Giza.