(evolutionary theory, geology) One of five historical events in which the Earth experienced a loss of ∼75% of all species over a geological interval of less than 3 million years, the most recent being the Cretaceous–Paleogene extinction event 66 million years ago.

The rapid dying off of a large percentage of all animal species in a comparatively short period of time 65.5 million years ago. This coincides with the end of the Cretaceous period, and may have been caused by an impact event.

After one has seen the consequences of a decision, it is easy to tell whether or not the decision was favorable, but it is also too late, since the consequences have already occurred.

A mass extinction between the Triassic and Jurassic periods 201.3 million years ago.

plural of eventscape

(cultural anthropology) A set of locations (with associated actions and events) that jointly provide the setting for and represent a culturally important narrative.