TED Talks Daily TED Audio Collective

Our lives depend on curbing climate change, but so many priorities seem to be in competition. What's the most urgent thing humanity can do right now? Social entrepreneur James Irungu Mwangi tells us why Africa could be the ideal home for scaling the latest and most ambitious climate technologies -- including in places like Kenya's Hell's Gate National Park, which could become part of what he calls the "Great Carbon Valley."

SpaceX's Starship launch vehicle has the potential to explore the solar system in a bold, new -- and supersized -- way. Planetary scientist Jennifer Heldmann talks about how reusable, large-scale spacecraft like Starship could help humanity achieve its next galactic leaps and usher in a new era of space exploration, from investigating the solar system's many ocean worlds to launching bigger telescopes that can see deeper into the universe.

Today, there are many ways to conceive a child, thanks to assisted reproductive technologies like IVF and egg-freezing. But the law lags behind these advancements, says attorney Ellen Trachman, troubling parents-to-be with stranger-than-fiction mix-ups and baffling lawsuits. Trachman makes the case for legality to reflect the realities of reproductive innovation -- and prompts you to reconsider what could happen to your own genetic material.

We can all play a role in the climate movement by tapping into our skills, resources and networks in ways that bring us satisfaction, says climate leader Ayana Elizabeth Johnson. She suggests drawing a Venn diagram to map these questions: What are you good at? What is the work that needs doing? And what brings you joy? Where your answers intersect is where you should put your climate action effort. "Averting climate catastrophe: this is the work of our lifetimes," Johnson says.

Black history in the US is rich, profound -- and at risk of being lost forever, if not for the monumental efforts of Julieanna L. Richardson. As the founder of The HistoryMakers -- the largest national archive of African American video-oral history -- Richardson shares some of the unknown and incredible legacies of Black America, highlighting the importance of documenting and preserving the past for future generations.

Nobody really knows how much it would cost to avoid the worst impacts of climate change. Yet historian Yuval Noah Harari's analysis, based on the work of scientists and economists, indicates that humanity might avert catastrophe by investing the equivalent of just two percent of global GDP into climate solutions. He makes the case that preventing ecological cataclysm will not require the major global disruptions many fear and explains that we already have the resources we need -- it's just a matter of shifting our priorities.