Now some of those chains of descent have involved rapid mutation and adaptation to meet changing diets and environments while others have not.

He mused that if traditional English continued its rapid mutation, "translators will be needed" and universities would treat it "as a classical language."

Though some of his critics, which included many field naturalists, wondered why no other organism seemed to show the same kind of rapid mutation.

Although the ritual was banned in the 1950s, the tribe has undergone a rapid genetic mutation that protects against the condition and has ended the disease.

They point out that the rapid mutation of the AIDS virus and its many strains make development of a vaccine difficult.

An additional side effect of the EMP is the rapid mutation of many forms of life, including Shoemaker himself.

But with hip-hop's rapid mutations, the Wu imprimatur has been losing clout.

Novel sets of equations suggest that the best way to make really good antibodies is to have periods of rapid mutation followed by periods of rest.

No one knows what causes such rapid mutation in the dark zone or why it occurs.

The thing might have come about because of very rapid repetitive mutations inside of nucleo- tides in a given gene.