'Pennichnus formosae' is believed to be the first known trace fossil produced by a sub-surface ambush predator.
The significant find is giving researchers a rare up-close look at ancient “sand strikers.”
'Pennichnus formosae' is believed to be the first known trace fossil produced by a sub-surface ambush predator.
The significant find is giving researchers a rare up-close look at ancient “sand strikers.”
500 million years ago, the world was a very different place. During this period of time, known as the Cambrian period, basically..