So a 40-foot Tyrannosaurus rex might have a 10-inch penis or a 12-foot penis. Furthermore, according to Slate’s Brian Palmer, “paleontologists can only guess at mating positions, duration and behavior.
Dinosaurs also likely had courtship rituals, such as triceratops latching their horns to compete for mates. Even penis size is unknown: judging by the varying sizes of dinosaur relatives, a Tyrannosaurus rex could have had a penis that was anywhere from 10 inches to 12 feet.
rex’s closest living relatives, we can conclude that the predator had a penis in this cloaca. “Crocodiles all have what is politely called an ‘intromittent organ,'” says Switek.
Birds and reptiles have a cloaca – a single opening used for excretion, urination, mating and egg laying – so it was always assumed that dinosaurs had it too. The cloaca of the Psittacosaurus confirms this expectation. Only the outer part of the cloaca has survived.
The actual moment of copulation was probably very brief to minimize mechanical stress on both partners. The male may have thrown a leg over the female’s tail and used a relatively long, stretchable penis to reach the female’s genitals.
Dinosaurs lived in three geological periods – the Triassic (252-201 million years ago), the Jurassic (about 201-145 million years ago) and the Cretaceous (145-66 million years ago). These three periods together make up the Mesozoic.
To get this straight, yes, dinosaurs appear to have urinated. For years scientists have assumed that dinosaurs, like most of their bird descendants, evacuated liquid and solid waste in a single stream from an opening called the cloaca.
Measuring the body temperature of a dinosaur
Most placental animals have a body temperature that is too high for sperm, and it is thought that almost all of them have testicles that descend during development and ends in the lower abdomen or further down in a scrotum.
Dinosaurs must have had sex to reproduce. As with nearly all modern reptiles, males deposited sperm into females that would later lay fertilized eggs containing developing dinosaur embryos.
Summary: Researchers have established the time frame for dinosaur incubation to be three to six months, depending on the dinosaur. A human normally gives birth to a child after nine months.
(It’s also possible that dinosaurs didn’t have penises and, like some birds, reproduced by squirting sperm from one cloaca to the other.) Modern ornithologists and herpetologists call this a “cloaca kiss”. Beyond that, it’s all guesswork. Paleontologists can only speculate about mating positions, duration and behavior.
Beta is a juvenile Velociraptor and the offspring of Blue, who makes her debut in Jurassic World: Dominion. Henry Wu explains that Beta was born asexual due to the monitor lizard DNA in Blue’s genetic makeup.
At that time, all the land on earth formed a single continent, Pangea. The age immediately before the dinosaurs was called the Permian. Although there were amphibious reptiles, early versions of dinosaurs, the dominant life form was the trilobite, visually somewhere between a woodlice and an armadillo.