By — William Brangham William Brangham By — Madison Staten Madison Staten By — Solveig Rennan Sandbulte Solveig Rennan Sandbulte By — Satvi Sunkara Satvi Sunkara By — Alexa Gold Alexa Gold By — Zoie Lambert Zoie Lambert Leave your feedback Share Copy URL https://www.pbs.org/newshour/video/horizons/2026/10/exploring-the-science-of-keeping-your-mind-sharp-as-you-age Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Story Everyone wants to keep a sharp mind as they age, especially as dementia cases continue to rise. Now, a growing body of evidence suggests almost half of the key risks for cognitive decline can be prevented or delayed. Horizons moderator William Brangham explores the emerging science that can help protect against dementia with Dr. Jonathan Rosand of the Global Brain Care Coalition. By — William Brangham William Brangham William Brangham is an award-winning correspondent, producer, and substitute anchor for the PBS News Hour. He also serves as the host of Horizons from PBS News. @WmBrangham By — Madison Staten Madison Staten By — Solveig Rennan Sandbulte Solveig Rennan Sandbulte Solveig Rennan Sandbulte is a producer of national affairs for PBS News Hour and Horizons. By — Satvi Sunkara Satvi Sunkara Satvi Sunkara is a producer for PBS News. By — Alexa Gold Alexa Gold Alexa Gold is a producer for PBS News. By — Zoie Lambert Zoie Lambert Zoie Lambert is an associate producer for PBS News.