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The sex life of dinosaurs

How did such massive creatures manage to mate?


 

New York’s American Museum of Natural History is set to launch an exhibition on the world’s largest dinosaurs. Among the unknowns about how such massive monsters lived, Slate tackles one particularly pressing question: how did dinosaurs have sex? Paleontologists don’t know much about how dinosaurs mated, because soft tissues rarely turned up in fossils, and even a specimen’s gender was unknown until a few years ago, when it was discovered that females had a special calcium reservoir to help with eggshel formation. Dinosaurs probably had a “cloaca,” a single opening for urination, defecation and reproduction, in which case they may have had sex from behind. It’s also possible that males had no penises and like some birds, reproduced by squirting semen from one cloaca to another. Large males like the Mamenchisaurus, which was 60 feet long, probably mounted from behind like giraffes and elephants. Dinosaurs probably had courtship rituals, too, like triceratops who locked their horns to fight over mates. Even penis size is unknown: judging from different sizes of dinosaurs’ relatives, a Tyrannosaurus rex might have had a penis that ranged in size from 10 inches to 12 feet.

Slate


 
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The sex life of dinosaurs

  1. Very carefully!!! :-D

  2. Gravity or weight is determined by comparison. A troy ounce of bronze is locked away and is protected from erosion etc. This little thing is what is used to keep whats know as standard weight.

    It is not known that true gravity (weight) is in constant change and those days that you feel light and bouncy and the times you feel heavy YOU REALLY ARE!
    cbc.ca bruce voigt

  3. Gravity or weight is determined by comparison. A troy ounce of bronze is locked away and is protected from erosion etc. This little thing is what is used to keep whats know as standard weight.

    It is not known that true gravity (weight) is in constant change and those days that you feel light and bouncy and the times you feel heavy YOU REALLY ARE!
    cbc.ca bruce voigt

  4. Ineffectively. They are extinct afterall.

  5. Ineffectively. They are extinct afterall.

    • You beat me to it.

  6. You beat me to it.

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