Question: Could dinosaurs ever come back to life on earth?

Ciarán O'Brien answered on 13 Nov 2014:

There are two ways we could see dinosaurs on Earth again:

1: They evolve all over again. This would require the atmosphere and weather to go back to the way is was hundreds of millions of years ago. It’s pretty unlikely, to be honest.

2: We manage to clone dinosaurs, like the movie Jurassic Park. this is a lot more likely to happen, but there are problems with it right now. The biggest problem is finding DNA from dinosaurs. In jurassic park they found it in prehistoric mosquitos that got fossilised in amber, but there aren’t many of those in the whole world, and DNA is very fragile, heat and cold will break it up and destroy it. So even if you find a mosquito that was full of dinosaur blood just before it got trapped in amber, the DNA in the blood would be full of gaps. And you can’t just “fill in the blanks” with frog DNA like they did in the movie, even if the DNA was compatible there are so many gaps to fill in you’d end up with a frog with a few bits of dino-DNA, not the other way around.

But it’s possible that we might some day find some well preserved dinosaur DNA in a very cold country, it might be possible to clone a dinosaur out of that. Scientists found a woolly mammoth in the ice not too long ago, it’s preserved well enough to look at its DNA 🙂