- Extinction - Wikipedia
In biology, extinction is the termination of an organism or of a group of organisms (), usually a species The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point Because a species' potential range may be very large, determining this moment is difficult, and is
- 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 Estimates of the number of major mass extinctions in the last 540
- K T extinction event - Simple English Wikipedia, the free . . .
The Cretaceous–Tertiary extinction event, now called the Cretaceous–Palaeogene extinction event, was about 66 million years ago It may be called the K T extinction event or 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