How ibogaine could treat depression and anxiety | Nolan Williams
TED Talks Daily
12/05/25
•16m
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The late Stanford neuroscientist Nolan Williams shares his research on the potential of a plant-derived psychoactive compound called ibogaine to help people with traumatic brain injury recover from PTSD, depression and anxiety. (Followed by a brief Q&A with Head of TED Chris Anderson)
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Why are we demolishing homes during a housing crisis? | Olaf Grawert
December 4, 2025
•14m
Every minute somewhere in Europe, a house is demolished — along with the memories and sense of community it holds, says architect Olaf Grawert. Exposing the human and environmental cost of demolition for profit, he highlights a bold alternative that could address the growing housing crisis. Learn how rethinking the value of the buildings we already have could create sustainable, affordable homes for millions and reshape the future of cities.
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For the first time in climate negotiations, leaders are asking the question that actually matters: not just how do we solve the climate crisis — but why aren't we? Join Nobel laureate Al Gore for an in-depth conversation with Wanjira Mathai and Karenna Gore, leaders of the Global Ethical Stocktake: an urgent, values-first reset that seeks to center justice, phase out fossil fuels and elevate Indigenous and Global South leadership. Discover the initiative that's making fossil fuel lobbyists squirm and climate veterans hopeful — before the world moves on to COP31.
Please note, this conversation was recorded live on November 14, 2025, at the TED Countdown House at the United Nations Climate Change Conference, or COP30, in Belém, Brazil. There are a variety of names mentioned during the conversation of global leaders involved in the convening that took place at COP30, they are as follows (listed in order of mention):
Laurence Stebiana, Special Envoy to Europe for COP30
Marina Silva, Brazil's Minister of the Environment and Climate Change
Kumi Naidoo, South African human rights activist and former director of Greenpeace
Selwin Hart, Special Adviser to the United Nations Secretary-General on Climate Action and Just Transition
António Guterres, United Nations Secretary-General
Gus Speth, American environmental lawyer
"Mutirão COP30," the Tupi-Guarani term meaning "a collective effort or community mobilization"
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