Sentence examples for is not primordial from inspiring English sources

The disk is not primordial, but a dynamical consequence of debris that are continuously replenished by mutual collisions between planetesimals (Weissman, 1984; Backman et al., 1992; Backman and Paresce, 1993; Krivova et al., 2000).

Polonium forms naturally after the decay of other elements, even though it is not primordial.

Titan's nitrogen-rich atmosphere is thought to be not primordial but rather a secondary atmosphere like Earth's.

What Wilkinson does is to locate the origins of Egyptian civilisation, not in some fabulous dimension featuring Atlantis or aliens from Sirius, but in realms of political behaviour that are not primordial at all.

The best predictions in 1999 and 2000 came from a model based on a theory that most astronomers would consider absurd, that comets are not primordial ice balls dating back to the beginnings of the solar system, but shards of a small planet or moon that exploded 3.2 million years ago.

The helium that is present on Earth is not a primordial component but has been generated by radioactive decay.

As Palumbi explains, scientists now recognize that evolution is not some primordial force that disappeared with the dinosaurs.

"Peace would be a useful, additional condition," he said, "but it is not the primordial, necessary condition, which is, anywhere, economic freedom".

Moreover, an emission line of iron can frequently be detected in the X-ray spectrum, indicating that the intracluster gas has undergone nuclear processing inside stars and is not of primordial origin.

This discrepancy is due to the fact that the Sobolev approximation is not valid in primordial gas clouds.

Moreover Tsix expression is not observed in primordial germ cells (PGCs) at the time of X reactivation [ 13].