The Taiga forest, on the edge of the Arctic, is a silent world of stunted conifers. The trees may be small but filming from the air reveals its true scale. A third of all trees on Earth grow here and during the short summer they produce enough oxygen to change the atmosphere. In California General Sherman, a giant sequoia, is the largest living thing on the planet, ten times the size of a blue whale. The oldest organisms alive are bristlecone pines. At more than 4,000 years old they pre-date the pyramids. But the baobab forests of Madagascar are perhaps the strangest of all. false 2019-12-03 21:09:27 8.2 2006 48 /mnt/magadi_3T/Videos/Séries/Planet Earth (2006)/Season 1/Planet Earth - S01E10 - Seasonal Forests-thumb.jpg 10 1 2006-12-03 https://artworks.thetvdb.com/banners/episodes/79257/313649.jpg