Could Jurassic Park really happen?
In Steven Spielberg's Jurassic Park films, scientists bring dinosaurs back from the dead by using dinosaur DNA to recreate them.
But where could we get dinosaur DNA from?
Dinosaurs are loosely related to birds and scientists have claimed it might be possible to alter bird DNA to create a "Jurassic chicken" in 50-100 years' time.
Could Jurassic Park really happen?
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