We continue our conversation around projects that essentially "de-extinct" a species ad bring it back. This week we look at the argument that critics of these projects raise, specifically that re-introducing a modernized version of some of these extinct species may not have the intended effect on a habitat, and may cause more harm than good in an ecosystem. 

We look at a few examples of invasive species and the havoc they cause in their new environment, as well as look at some alternative methods of conserving and protecting endangered species.