Bones of Turkana, the stunning new National Geographic Special, follows Richard Leake’s astonishing life and investigates four decades of exploration and discovery in Africa, alongside Meave and Louise, both paleontologists and National Geographic Explorers-in-Residence.

In 2011, the worst tornado season in decades left a trail of destruction across the U.S., killing more than 550 people. Why was there such an extreme outbreak? How do such outbreaks form? With modern warning systems, why did so many die? Is our weather getting more extreme - and if so how bad will it get?

Deep in the heart of Idaho lies the Frank Church-River of No Return Wilderness, part of the largest roadless area left in the lower 48 states. At 2.5 million acres, it is larger than Yellowstone, yet most people have never even heard of it. Designated a federally-protected wilderness in 1980 by Congress, the region is full of deep canyons and mountain forests, rivers and abundant wildlife. Otters and elk, deer and coyotes, blue birds and bighorn sheep, and newly-restored wolf populations all thrive there.

The bushfires that tore through the Australian state of Victoria in February 2009 incinerated over a million acres of land, including key mountain ash forest ecosystems. Fires are a natural force of nature which spur regeneration, but the immediate aftermath of this giant firestorm was devastation. By the time the fires subsided, 173 people had lost their lives, over one million acres of mountain ash forest had been destroyed, and countless animals had perished.