The 2016 Reebok CrossFit Games were a grueling five-day, 15-event test to find the fittest man and woman on Earth. "Fittest on Earth: A Decade of Fitness" follows the dramatic story of the top athletes who qualified and competed and offers an inside look at what it takes to be among the world's elite athletes, both in training and on the competition floor. The CrossFit Games challenge competitors to perform intense physical tasks, but the hardest part is sometimes mental. Athletes often learn the details of the events only minutes before they begin, and everyone handles the pressure differently. Which of these fierce competitors will rise to the top and earn the title of Fittest on Earth?

We're entering the Earth's sixth era of extinction -- and it's the first time humans are to blame. CNN introduces you to the key species and people who are trying to prevent them from vanishing.

Swimming, Dancing examines audiovisual representations of the Yangtze (1934–present), from silent film to video art to the contemporary vlog. Inspired by the city symphonies of the 1920s, Swimming, Dancing pieces together a “river symphony”, evoking the images, sounds and contradictions that make up the river’s turbulent history.

The film interweaves the personal accounts of polio survivors with the story of an ardent crusader who tirelessly fought on their behalf while scientists raced to eradicate this dreaded disease. Based in part on the Pulitzer Prize-winning book Polio: An American Story by David Oshinsky, Features interviews with historians, scientists, polio survivors, and the only surviving scientist from the core research team that developed the Salk vaccine, Julius Youngner.

The climate is changing, global temperature is rising. The impacts are already apparent, especially in the mountains but also in the lowlands. The permafrost zone is shifting higher up and the masses of snow melt whooshing from the glaciers to the valleys are already increasing incessantly. Rivers are going to rise up to powerful floods and dwindle down to extremely low waters the next second.

Virologist Dr Chris van Tulleken embarks on a global investigation into the hunt for the pathogen that could trigger the next pandemic and the cutting-edge science developed to tackle it. Known only as ‘Disease X’, it is shrouded in uncertainty. Its origin is unknown, how it could spread is unclear, but its impact could be much more severe than Covid-19. To uncover what Disease X might be, where it could emerge and what traits it needs to spread, Chris follows the paths of past deadly viruses. He visits the ground zero of the Nipah virus in Malaysia, which inspired the film Contagion. He also heads to the front line of the ongoing bird flu outbreak in US dairy cattle in California.

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Sahrawi artist and visual poet Mohamed Sleiman Labat follows the story of the emerging phenomenon of small scale family gardens in his local community in the Hamada Desert. The film features the story of four families in Samara Camp with small scale gardens, their practices and the knowledge they develop as part of their practices in the garden. The camps are located in a very harsh environment with extreme climate conditions, and the Sahrawi are still dependent on international food aid.

Narrated by Academy Award winners Sissy Spacek and Herbie Hancock, River of Gold is the disturbing account of a clandestine journey into Peru's Amazon rainforest to uncover the savage unraveling of pristine jungle. What will be the fate of this critical region of priceless biodiversity as these extraordinarily beautiful forests are turned into a hellish wasteland?

The Nomad Garden is an ode to the impossible. A young Sahrawi refugee shows how he grows organic vegetables and herbs in one of the most inhospitable places on Earth, overcoming challenges like the lack of water, extreme temperatures and a barren soil.

Florence Henderson (The Brady Bunch) shares her personal secrets for helping women look and feel their best. Beauty tips for proper skin care, easy make-up techniques, hair and fashion. Plus, how to relieve stress and simple things you can do to add to your overall fitness health!

Both during and after pregnancy, yoga is a perfect way to firm your body, build strength, and gain flexibility. These two yoga practices, filmed in a serene garden overlooking the Pacific Ocean, are also a wonderful way to maintain emotional balance and reduce stress during the exciting and often hectic times surrounding the birth of a child. In the prenatal sequence you'll practice safe and simple movements intended to strengthen and tone your body at any stage of pregnancy, while providing relaxation that will help create a luminous space in which your baby will thrive. The postnatal sequence is designed to redefine your body, restore your energy, and help you reconnect to yourself and your own wellness.