Since we don't even know if Amargasaurus is even extinct at all, it's hard to say, so far theres only speculation. Some say it is extinct and some say it never went extinct and might exist today.
Argentavis was the largest flying bird in recorded history. It is not known exactly why they went extinct but it is most likely that they could not adapt to changes in the climate.
Yes, Argentavis magnificens went extinct in the late Miocene period.
Yes, the Argentavis which was basically a bird had to be a giant so that it would be able to catch the horse.
Why did the dinosaurs go extinct? Humans will never go extinct!
Missouri is a state - it is not a living thing so it cannot go extinct.
they are not extinct yet.
They are not extinct...
150 MPH or 240 KM/H
It has NEVER been extinct.
They are not expected to become extinct.
if they go extinct then the things that they eat will get over populated.
hippos didn't go extinct because they are still producing
The hectors dolphin did not go extinct you may be thinking of the baiji river dolphin witch went extinct in 2006.