Has there ever been a more lovable dinosaur than the gentle giant brontosaurus? So too its offspring! Even with a name that translates to "thunder lizard," it may well have had the cutest babies in the history of dinosaurs.
The enormous creatures for a time were considered just another kind of apatosaurus, but last year science finally agreed that that they were their own genus and species, which put big brontosaurus back in its own limelight.
Fully grown, they'll weigh anywhere from 25 to 40 tons. But, as newbies just hatched from among the enormous dino's clutch of eggs on the ground, the spry, relatively tiny children will need some time before they're that big.
Still, though: Straight out of the egg, they were ready to go -- light enough at that point to run on two feet, a veritable herd of them looking like tiny specks of scampering earth, as they tried to keep up with their lumbering parents.