A giant undersea sand worm's fossilized lair, Earth
By A Mystery Man Writer
Giant worms terrorized the ancient seafloor from hidden death
Terror beasts' that ruled the ocean 500 million years ago discovered
Centimeter-wide worm-like fossils from the lowest Cambrian of
Giant' Predator Worm That Ruled Ancient Oceans Discovered in
Giant' Predator Worm That Ruled Ancient Oceans Discovered in Greenland : ScienceAlert
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Giant predatory worm's ancient fossil burrows discovered
