A Mammal Dinosaur?
“Scientists say they have found the first evidence that giant sea reptiles – which lived at the same time as dinosaurs – gave birth to live young rather than laying eggs.
They say a 78 million-year-old fossil of a pregnant plesiosaur suggests they gave birth to single, large young.
Writing in Science, they say this also suggests a degree of parental care.
The fossil, the first of a pregnant plesiosaur found, is at the US Natural History Museum of Los Angeles County.
After being excavated from a ranch in Kansas, US, the 5m-long fossil skeleton Polycotylus Latippinus lay for two decades in the basement of the Los Angeles museum waiting to be chiselled from its rocky casing.”