L Alvarez 1980 Ir-anomaly + 1991 Chicxulub crater; modern dust-cooling + post-impact firestorm + 2024 deep-sea-sediment Cohen.
L Alvarez 1980 Ir-anomaly + 1991 Chicxulub crater; modern dust-cooling + post-impact firestorm + 2024 deep-sea-sediment Cohen.