Trilobites, the earliest known visible form of life!
This 36mm fossil Olenellus Chiefensis trilobite is from Nevada.
It dates to the early Cambrian, 540 - 520 million years ago, and is one of the earliest known trilobites, and thus one of the earliest known visible life forms.
Note the apparent lack of defensive spikes and spines. They had no predators!
back to hobby page