Axolotls are used to study cancer development and organ regeneration, but their numbers in the wild are dwindling. Conserving wild salamanders could be vital for research—and the future of this special species. This video was reproduced with permission and was first published on November 24, 2017. It is a Nature Video production.
The Devils Hole pupfish (Cyprinodon diabolis) is the rarest fish in the world. Found only in a single, tiny limestone cavern in the Devils Hole geothermal pool about 100 km east of Nevada’s Death Valley National Park, these fish have the smallest known geographic range of any vertebrate in the wild.