20 Things That May Be Gone from the Earth by 2050

Mountain yellow-legged frog

Once said to be the most abundant amphibian in Southern California’s Sierra Nevada and Transverse mountain ranges, the mountain yellow-legged frog has become endangered.

Even though they can survive freezing, high-elevation winters, these frogs have largely succumbed to other dangers.

They are extinct in more than 93 percent of their former homes and scientists predict they could be completely extinct within decades.

The U.S. Fish and Wildlife Service created a recovery plan in 2018 aimed at helping save this species.