Recently, Halloween may have brought thoughts of skeletons, but the true “skeleton age” began long ago during the early Cambrian Period, roughly 538 to 506 million years ago.
During this transformative era, many of Earth’s major animal groups…
Recently, Halloween may have brought thoughts of skeletons, but the true “skeleton age” began long ago during the early Cambrian Period, roughly 538 to 506 million years ago.
During this transformative era, many of Earth’s major animal groups…