Global catastrophic risk
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A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, endangering or even destroying modern civilization. Existential risk is
Artist's impression of a major asteroid impact. An asteroid caused the extinction of the non-avian dinosaurs.
The Cretaceous–Paleogene extinction event, formerly known as the Cretaceous–Tertiary extinction event, was a major mass extinction of three-quarters of the plant and animal species on Earth which occu
Global catastrophic risk
…Artist's impression of a major asteroid impact. An asteroid caused the extinction of the non-avian dinosaurs. A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, endangering or even…
Discoscaphites iris, an ammonite from the Owl Creek Formation (Upper Cretaceous), in Owl Creek near Ripley, Mississippi
Rudist bivalves from the Late Cretaceous of the Omani Mountains, United Arab Emirates. Scale bar is 10 mm.
Tyrannosaurus was among the dinosaurs living on Earth before the extinction
Hell Creek Formation