From PBS Terra.

Check out our merch here! https://www.youtube.com/pbsterra/store

Scientists just released the 2025 Global Tipping Points Report. And they say we’ve already crossed our first major tipping point, but it’s not what you think.

From melting ice sheets to collapsing ocean currents, these sudden, irreversible changes could reshape the planet in ways we can’t undo. But what does it really mean to cross a tipping point? How do we know we’ve crossed one? And how close are we to triggering others?

In this episode of Weathered, Maiya May talks with scientist Tim Lenton, who helped popularize the term “tipping point” in a landmark 2008 paper, to uncover which Earth systems are at risk, why they’re so hard to predict, and what crossing a tipping point means for our future.

2025 Global Tipping Points Report: https://global-tipping-points.org/

*****
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateTerra
*****

Subscribe to PBS Terra so you never miss an episode! https://bit.ly/3mOfd77

And keep up with PBS Terra on:
Facebook: https://facebook.com/pbsdigitalstudios
Tiktok: https://www.tiktok.com/@pbsterra
Instagram: https://instagram.com/pbsterra