De-Extinction: Bringing Back Mammoths and Dinosaurs

Will there ever be a real Jurassic Park like in the movie? Can we take the DNA of long gone animals, like dinosaurs and mammoths, and clone them? Can we reverse the mass extinction that is engulfing our planet? Can we take parts of the ancient DNA and mix it with modern animals to make hybrids?
As science progresses we find new and exciting things we can do in the lab. De-extinction is amazing and controversial, but what is most exciting about it: it is becoming a real possibility now.
This book is a short less-than-an-hour essay on the exciting topic of de-extinction. The author, Dan Mayers, is a science teacher and writes using simple and concise layman language.