Hidden Moon, Rejuvenation Protein, and an Antarctic Tipping Point – Science Breakthroughs (Aug 21–22, 2025)
NASA’s James Webb Space Telescope discovered a new inner moon orbiting Uranus, about 6 miles wide, raising the planet’s known moons to 29. Astronomers reported observing supernova SN 2021yfj with an exposed silicon/sulfur core after its progenitor shed outer layers. A Nature study warns Antarctic sea ice loss could trigger a self-sustaining climate tipping point.