Dinosaur Extinction Triggered by Dust from Asteroid Collision, Global Photosynthesis Shut Down for Nearly Two Years, Study Reveals

Continued research at North Dakota's Tanis site reveals micrometer-sized dust particles persisted up to 15 years post-asteroid impact, causing an estimated 59°F temperature drop and a virtually complete shut-down of photosynthesis for four years, leading to the extinction of dinosaurs.