It is well-known that dinosaurs ruled the earth at some stage of life and they could only do this by being good at mating. But have you ever thought of how the 30-tonne animals, higher than four-storey buildings, had sex?
The question has now been answered -- they made love just like dogs do, according to experts, the Daily Mail reported.
Kristi Curry Rogers, Assistant Professor of Biology and Geology at Macalester College in Minnesota, told the Discovery Channel: "The most likely position to have intercourse is for the male behind the female, and on top of her, and from behind, any other position is unfathomable."
Some experts, however, have questioned such a line of thinking while suggesting that dinosaurs romped in water.
According to biologist Stuart Landry, big dinosaurs would just fall over on land and would have needed water to provide support.
Gregory Erickson, a paleobiologist at Florida State University supported Rogers, saying : "It's going to be very touch and go. It's an awkward thing.
"I've heard speculation that they did it in the water, but they're not aquatic animals. Just because they're large animals, doesn't mean they can't mate on land - after all, elephants do it."