An explosive viral video shows a white policeman throwing a Black teenager from her school desk. One woman uproots her life to help the girl, face the officer, and dismantle the system behind the “Assault at Spring Valley.”

Alex Honnold is the most accomplished free climber in the world. Angola is a southwest African country that recently emerged from 27 years of bloody civil war. What brings together these strange bedfellows you ask? Some of the most epic unclimbed rocks in the world, and a community needing help to diffuse the hidden land mines leftover from the conflict. (Plus a shadowy local hotel magnate, but we'll get into that later). This is Alex Honnold in Angola, for one of the most unique adventures of his storied climbing career this far.

Follows renowned cave explorer Bill Stone as he and his team push the boundaries of what has ever been done before as they attempt one of the greatest achievements of modern exploration — to set a new world record by venturing into the bottom of what is thought to be the deepest cave in the world.

After years of addiction and a life changing accident, André Kajlich aims to be the first double amputee to complete the Race Across America, a bone-crushing, sleep-deprived, 12 day, 3,082 mile bike race, revealing a true test of spirit and the pain we endure to carve our own path in life.

After years of addiction and a life changing accident, André Kajlich aims to be the first double amputee to complete the Race Across America, a bone-crushing, sleep-deprived, 12 day, 3,082 mile bike race, revealing a true test of spirit and the pain we endure to carve our own path in life.

From the mighty Amazon’s icy source to its plume reaching as far as the Caribbean, National Geographic Explorer teams conduct groundbreaking research to take the pulse of one of the planet’s integral and endlessly magical resources. From the health of river turtles and pink dolphins to the migration of Andean bears, extreme urgency is met by equally hopeful solutions.