For example, based on the primate fossil record, scientists know that living primates evolved from fossil primates and that this evolutionary history took tens of millions of years.
By comparing fossils of different primate species, scientists can examine how features changed and how primates evolved through time.
Amber is also valued for its botanical and animal inclusions that are trapped by the sticky resin as it flows as sap, which is also organic.
Of course, other life is captured including microscopic bacteria that often produce gas bubbles, and various fungi.
The next image (below left) is of charred fossil wood; and beside that is intact fossil wood (Note biro gives size perspective).