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What makes a tree grow tall? And do trees ever stop growing? Explore how photosynthesis and gravity can affect and limit the height of trees. Uploaded 14-03-19--Reaching heights of over 100 meters, Californian sequoias tower over Earth’s other 60,000 tree species. But even these behemoths seem to have their limits: no sequoia on record has been able to grow taller than 130 meters. So what exactly is stopping these trees from growing taller, forever? Valentin Hammoudi investigates why trees have limited heights.Lesson by Valentin Hammoudi, directed by Doug Alberts.Sign up for our newsletter: http://bit.ly/TEDEdNewsletterSupport us on Patreon: http://bit.ly/TEDEdPatreonFollow us on Facebook: http://bit.ly/TEDEdFacebookFind us on Twitter: http://bit.ly/TEDEdTwitterPeep us on Instagram: http://bit.ly/TEDEdInstagramView full lesson: https://ed.ted.com/lessons/how-tall-can-a-tree-grow-valentin-hammoudiThank you so much to our patrons for your support! Without you this video would not be possible! Guy Hardy, Brandy Sarver, Jose Arcadio Valdes Franco, Akinola Emmanuel, igor romanenko, Dian Atamyanov, Abhishek Bansal, Austin Randall, Ryan B Harvey, Jennifer Kurkoski, phkphk123321, Arlene Weston, Mehmet Yusuf Ertekin, Ten Cha, Les Howard, Kevin O'Leary, Francisco Leos, Robert Patrick, Marcus Appelbaum, Alan Wilder, Mohamed Elsayed, Aleksandr Lyozin, Angel Pantoja, Eimann P. Evarola, Carlos H. Costa, Tariq Keblaoui, Bela Namyslik, Nick Johnson, Won Jang, Sandra Fuller Bocko, Johnnie Graham, Harshita Jagdish Sahijwani, Amber Alexander, Yelena Baykova, John C. Vesey, Karmi Nguyen, Chung Wah Gnapp, Jane White, BRENDAN NEALE, Lawrence Teh Swee Kiang, Alex Pierce, Nick Cozby, Jeffrey Segrest, Anthony Arcis, Ugur Doga Sezgin, Kathryn Vacha, Allyson Martin, Srinivasa C Pasumarthi, 张晓雨 and Nishant Suneja. Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
