In this Fierce Earth special, Clare and Leo head to Death Valley in California which is officially the hottest place in the entire world, with record-breaking temperatures of a sizzling 57 degrees centigrade. The pair endure a special test to work out what color clothing is the best to wear in heat; Clare finds out what it's like to go to school in the world's hottest place; Leo becomes one of the first people in the world to climb the hidden canyons. Later, in the intense heat, Leo completes a section of the Badwater Ultramarathon, a race five times longer than the London marathon.

Encoded with permission for digital streaming by Infobase on May 23, 2014. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Introduction: World's Hottest: Fierce Earth (Series 1) (1:33) -- Death Valley (3:53) -- Coping with Heat (2:43) -- Deadliest Heat Waves (1:28) -- Death Valley School (3:11) -- Flash Flood (5:07) -- Solar Cooking (2:47) -- Badwater Ultramarathon (6:03) -- Survival Guide (0:58) -- Credits: World's Hottest: Fierce Earth (Series 1) (0:29).