Which Dinosaur Was the Biggest?

[dinosaur roaring] You wanna learn about it today? So what was the biggest dinosaur? Well, we aren't completely sure of the answer because we're only going off of what we've found.

[keyboard clacking] I'm sure there are more fossils and more records to discover, but as far as we know, the biggest dinosaur was called Argentinosaurus.

[dinosaur roaring] Argentinosaurus was a kind of sauropod, and a sauropod is a giant plant-eating dinosaur with a long neck, and a long tail, and a small head, and four thick legs.

If you picture a dinosaur like Brachiosaurus, that's a sauropod, too.

[dinosaur roaring] But Argentinosaurus, it was the biggest one of them all.

At least, we're pretty sure.

[upbeat music] So how big was Argentinosaurus? Well, scientists think Argentinosaurus may have been around 100 feet long.

[upbeat music] That's like if you took three really big school buses and lined them up back to back to back.

And Argentinosaurus may have weighed as much as several elephants put together.

That is enormous.