Basically, atomic nuclei are, within every terrestrial organism, "foreign bodies," or at least neutral.

According to Cavalier-Smith, eubacteria is the oldest group of terrestrial organisms still living.

And remember, the racemes are different from terrestrial organisms, so we did not grow from the same event that seeded Mars.

There were a lot of terrestrial organisms there.

In fact we were excluding terrestrial organisms; only filtering for the basic biochemical building blocks of Diadem life.

It seems to be caused by a terrestrial organism that we carried there and which liked the new climate more than the old one.

Besides, he reasoned, these samples are fresh from the site; there hasn't been enough time for any terrestrial organisms to contaminate them.

I can imitate a terrestrial organism in general and a human in particular.

Marine life is largely similar in biochemistry to terrestrial organisms, except that they inhabit a saline environment.

They polarize light the same way terrestrial organisms do!