what was the first dinosaur alive?

Question: what was the first dinosaur alive?
- Keywords:
  dinosaur,
  first,
  Life Science Centre
Asked by anon-271648 to Jake on 27 Nov 2020. This question was also asked by anon-271654.
- Jake answered on 27 Nov 2020:
  
  One of the earliest dinosaurs was a small meat eater from South America called Eoraptor. It lived about 240 million years ago, but scientists think there might be even older dinosaurs than that!

Question: what was the first dinosaur alive?