Naturally occurring macromolecules.
No, nor does Quinn have any idea how or why they are occurring in the first place.
Amber has indeed a very wide distribution, extending over a large part of northern Europe and occurring as far east as the Urals.
Some two dozen distinct species have been described as occurring in man.
She wondered if she had died, for she seemed able to see the conversation occurring from a dozen feet away, as if she were watching television instead of involved in it.
Roumanite, or Rumanian amber, a dark reddish resin, occurring with lignite in Tertiary deposits.