A 1996 fossil found by a farmer in Liaoning gave the first non-bird dinosaur with feather-like structures, and later melanosome studies even reconstructed its probable colouring, though the collagen-versus-feather argument took two decades to close.
The Alvarez team's 1980 iridium anomaly predicted a hidden asteroid crater, confirmed a decade later at Chicxulub, turning the dinosaurs' extinction from vague speculation into a dated, physically evidenced event.