What estimated year where dinosaurs in our planet?

Question: What estimated year where dinosaurs in our planet?
- Keywords:
  dinosaur,
  planet,
  year
Asked by DaaniBoyy to Ajay, Kate, Kuntal, Pip, Reka on 17 Nov 2016.
- Reka Nagy answered on 17 Nov 2016:
  
  We can’t name the precise year when the last dinosaur was wiped out – we can only estimate it in terms of millions of years – and they became extinct about 65.5 million years ago

Question: What estimated year where dinosaurs in our planet?