Dominated by carbon-rich swamps and forests proliferating across Earth's rocky surface, the Carboniferous period saw a boost in atmospheric oxygen and vast quantities of carbon dioxide trapped in what ...
A remarkably preserved horseshoe crab fossil from North America offers rare insight into some of the earliest known cases of animal disease in a Late Carboniferous swamp—some 50 to 70 million years ...
Paleontologists surveying a dry riverbed in northeastern Brazil repeatedly encountered the same type of fossil: a lower jaw about six inches long, curved and thick, and twisted in an unexpected way. A ...
The fossil measured only 4 centimeters, nowhere near the giants that made Arthropleura famous. Yet this small specimen, found at Montceau-les-Mines in France, ended up yielding one of the missing ...
The Smithsonian Institution Archives welcomes personal and educational use of its collections unless otherwise noted. For commercial uses, please contact [email protected] International media ...