“Cerrejón is the best, and probably the only, window on a complete ancient tropical ecosystem ... There was an impression of a fossil leaf on it. He picked up another rock.

Helmetia had a leaf-like exoskeleton, with some specimens preserving eyes, medial eyes, digestive systems and limbs. Early arthropods had limbs with a walking leg for locomotion and food capture ...

uncovered behaviors and species previously undocumented in the monument's fossil record, including: “These tracks offer a rare window into ancient ecosystems,” Nicholas Famoso, the monument ...

A new species of fossil is 444 million years-old with soft ... trying to figure out how they lived what they tell us about ancient life and evolution on Earth.” ...