De-extinction, or using the power of modern biotechnology to bring back extinct species like mammoths and dinosaurs, would be cool. But is it really as easy as the movies make it look? Or do the cruel hands of time make it impossible? This week we look at the technical and ethical hurdles behind the science of de-extinction and reverse engineering species that are no longer around.

Originally released by Knowledgemotion, 2017. Streaming video file encoded with permission for digital streaming by Infobase on February 21, 2020.

De-Extinction: A Mammoth Undertaking (4:41); .