Fossil discovery links dinosaurs, grass and fungus that was precursor to LSD. An artist's depiction shows Miragaia dinosaurs grazing during the Jurassic Period. Getty Images — -- Millions of ...

To compare Miragaia with the long-necked sauropod dinosaurs like Apatosaurus, you need to go down to the bones. There is not just one way a long neck can evolve.

Wikimedia Commons // CC BY-SA 3.0. When people use the term long-necked dinosaurs, they’re almost always talking about sauropods, a group of gigantic vegetarians which included Brontosaurus.But ...