The true nature of the “Tully monster” may once again be a mystery. Just last year, some researchers declared that the extinct aquatic animal was a vertebrate, possibly a relative of today’s lampreys.

To say that paleontologists can’t make heads or tails of the Tully Monster would be untrue. The claw-tipped proboscis on the front end and the arrow-shaped rear fins at the posterior end can be easily ...

The Tully monster, a bizarre beast that plied the seas 307 million years ago, has long mystified scientists. Its features, including eyes like a hammerhead’s and a pincer-like mouth, look like they ...

NEW HAVEN, Conn., March 16 (UPI) --Finally, scientists have confirmed the identity of the Tully Monster. The oddly shaped, soft-bodied sea creature was a vertebrate. The Tully Monster, Tullimonstrum ...

Tully monsters haunted Earth's oceans 300 million years ago and left behind such bizarre fossils that researchers haven't even agreed on whether these strange creatures had backbones. Now, more than ...

The Tully Monster, an oddly configured sea creature with teeth at the end of a narrow, trunk-like extension of its head and eyes that perch on either side of a long, rigid bar, has finally been ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Discovered in the 1950s and first described in a paper in 1966, ...

A prehistoric creature known as the Tully Monster (official name: Tullimonstrum gregarium) has puzzled scientists since it was first discovered by an amateur fossil collector in Illinois in 1958. The ...

For more than half a century, the Tully monster (Tullimonstrum gregarium), an enigmatic animal that lived about 300 million years ago, has confounded paleontologists, with its strange anatomy making ...

An artist's reconstruction shows the Tully Monster, a type of jawless fish called a lamprey, as it would have looked 300 million years ago in this image released on March 16, 2016. REUTERS/Sean ...

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