Research presented by the University of Maryland Dental School at this week's Microscopy Society of America annual meeting in Richmond, VA, showed cylindrical objects extending out of the natural ...
Scientists found the 500-million-year-old fossil of a "penis worm" in the Grand Canyon—and reconstructed how the creature would have used its strange mouth to feed. The newly discovered species of ...
About 500 million years ago, the Grand Canyon was a great sea, and among the creatures it harbored was a newly discovered type of penis worm, armed with many rings of teeth. Penis worms are marine ...
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