- Extinction - Wikipedia
In ecology, extinction is often used informally to refer to local extinction, in which a species ceases to exist in the chosen area of study, but may still exist elsewhere This phenomenon is also known as extirpation Local extinctions may be followed by a replacement of the species taken from other locations; wolf reintroduction is an example of this
- Extinction event - Wikipedia
An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms It occurs when the rate of extinction increases with respect to the rate of speciation Because most diversity and biomass on Earth is microbial, and thus
- K T extinction event - Simple English Wikipedia, the free . . .
The Cretaceous–Tertiary extinction event, or Cretaceous–Palaeogene extinction event, was about 66 million years ago It may be called the K T extinction event or even K Pg event for short This is the famous event which killed the dinosaurs at the end of the Cretaceous period It was a large-scale mass extinction of animal and plant species The event marks the end of the Mesozoic era and