Nature World News | 03.03.2026 20:25
A 90-million-year-old skeleton unearthed in Argentina brings Alnashetri cerropoliciensis into sharp focus, an adult alvarezsaur fossil that tipped the scales at under 2 pounds. This bird-like theropod flips conventional wisdom on dinosaur miniaturization, demonstrating that small sizes held steady across generations rather than dwindling over time. Discovered at the La Buitrera fossil site in northern Patagonia, the specimen delivers a near-complete blueprint for one of paleontology's most enigmatic groups, challenging decades of fragmented assumptions.
