Once a month
get new photos
and expert tips.

Science and Space
Main Health and Human Body Earth Space Prehistoric World A-Z

Photo Gallery: Carboniferous Period

PREVIOUS7 of 10NEXT


Perfectly preserved for more than 300 million years, a horsetail carries secrets from the Carboniferous period. Primitive vascular plants, horsetails (genus Equisetum) are often found in coal deposits. Photograph by John Cancalosi/Alamy