Examlex
Neural stem cells are important in the renewal of _______ neurons.
Meteor Impact
The collision of a meteoroid with the Earth or another planet, causing effects ranging from craters to climate changes depending on the size and speed of the meteoroid.
Extinction
The process through which a species ceases to exist due to the death of its last remaining members.
Dinosaurs
A diverse group of prehistoric reptiles that lived during the Mesozoic Era, now extinct.
Mass Extinctions
Events in Earth's history where large numbers of species become extinct in a relatively short period of time.
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