75% of Kilimanjaro's natural plants have been wiped out, and climate change isn't the biggest threat

Mount Kilimanjaro in Tanzania is sold to the world as frozen romance and pure nature. But the real story today is at its feet ...

What happens to ecosystems when you restore iconic top predators? It's more complicated than you might think

Across North America, mountain lions, bears and gray wolves have made a remarkable comeback over the last 50 years. Once ...