Furthermore, the fossils lacked the types of stable molecules that are sometimes left behind by fungi. "The problem that we had to overcome was finding Dickinsonia fossils that retained some ...

As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils. A fossil can be studied to determine what kind of organism it represents, how the ...

In the kits, the trilobite (2), brachiopod (3), dinosaur bone (4), horse tooth (5), petrified wood (6), graptolite (7), fish (8), smooth and jagged-margined leaves (9 and 10), fern (11), shark tooth ...

The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all ...