Tanzania's Pristine Coral Reefs

Mike Corey's off the coast of Tanzania exploring a coral reef that scientists say could be a game-changer for some species threatened by warming seas. We meet the Nepali Sherpas whose livelihoods on the slopes of Mount Everest have been effectively ended by the closure of the mountain for climbing, and we remember our 2020 trip to northern Italy's dramatic and brutal Battle of the Oranges - which happened just days before the pandemic arrived in the region.