An ancient giant – as massive as nine elephants – has emerged from Thailand. The dinosaur, named Nagatitan chaiyaphumensis, lived more than 100 million years ago during the Early Cretaceous. It was a sauropod, sporting a lengthy tail, a long neck, and a prodigious appetite for plants, à la the on-again off-again Brontosaurus. It likely weighed up to 28 tons and stretched some 27 meters (89 feet) long. That's truly immense – more than 10 tons mor…