The k-t extinction marks the transition from the cretaceous to the tertiary period in which it is hypothesized that a meteorite struck the Earth and caused a mass extinction.
Einstein
Alfred wegener
Is extinction the word you're looking for ?
the answer to the question is extinction
They are the end-Ordovician extinction, end-Devonian extinction, end-Permian extinction, the Triassic extinction, end-Cretaceous extinction.
Extinction.
Dalton
Louis Pasteur
from lava flow
The effect of mass extinction is extinction, death of a mass
It's a stream of particles.