VIDEO: Titanosaur could be biggest dinosaur yet

Scientists in Argentina have uncovered what could be the largest dinosaur yet found — a long-necked titanosaur as tall as a six-storey building, whose thigh bone alone dwarfs grown men.

It will take years of work for researchers to uncover the entire skeleton, and they will need a new museum once they put it together. Paleontologists say the titanosaur could have stretched 20m tall and 40m long, weighing the equivalent of 14 or 15 adult African elephants.