Strange Glass Spheres Found in Ancient Florida Clams Point to Meteor Strike

This initially appeared in the July/August issue of Discover journal as “Concept in a Clam.” Guidance our science journalism by becoming a subscriber.


In wealthy fossil deposits in southern Florida acknowledged as the Pinecrest beds, historic clams sit nestled in a mix of sand and clay, waiting to convey to their tales. In 2006, Michael Meyer joined his fellow undergraduates as they searched a quarry there for the fist-sized time capsules of historic environments. The pupils ended up seeking inside the clams for benthic foraminifera, single-celled organisms whose shells consider on diverse styles depending on their environments. Coiled or

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