Hip-hop often gets blamed for its controversial lyrics. What if there was a way to actually measure its impact on people’s lives? Analyzing 40 years’ worth of radio station data and lyrics from rappers like Tupac, Dr. Dre, Jay-Z and Kendrick Lamar, economist Roland Fryer puts one of culture’s most notorious debates on trial.

Each year, around two million women are released from prisons and jails in the US, many with nowhere to go. Susan Burton knows this firsthand: after cycling in and out of prison for years, she finally found a safe place to land … and made it her mission to offer others the same. She shares how she’s helping thousands rebuild their lives — and changing the way we think about second chances. (Recorded at TED2026 on April 15, 2026)

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The idea that depression comes from a chemical imbalance in the brain has shaped treatment for decades. Neuroscientist Lisa Monteggia shares research suggesting that’s not the whole story — and shows how a decades-old drug could upend what we thought we knew about depression, with the potential to offer relief within hours.