Scientists announced the discovery of the first nitroplast, a nitrogen-fixing organelle. It's just the 4th example in history of primary endosymbiosis.
David Wallace of Mississippi State University talks to Deborah Byrd about solar flares and the impact a big storm from the sun would have on Earth today.
Watch an interview with astrophysicist Or Graur and EarthSky's Dave Adalian discussing how the ancient Egyptian sky goddess, Nut, is linked to the Milky Way.
Is AI - artificial intelligence - the great filter that alien civilizations are unable to evolve beyond? The threat of AI and our own self-destruction, here.