Giant Water Scorpion makes tracks

5-Foot Giant Water Scorpion Once Roamed U.K. Shores
National Geographic

He said the creature walked in-phase, with each pair of limbs moving forward at the same time rather than alternating, like a human gait. Also, the scorpion's stride averaged 10.6 inches (27 centimeters) long, short enough that they overlapped.

The track also features a central groove left by the water scorpion's dragging tail, leaving indications of jerky movements. Simon Braddy, an earth scientist at the University of Bristol in England, specializes in ancient water scorpion tracks. He said the evidence is "unclear" that these newly discovered tracks were made on land.

"The whole thing adds up to fairly look as though the body [was] heavy and the animal was moving quite slowly," Whyte said. "For that reason I think it was out of the water. Had it been in [the water], water would've buoyed up the tail."

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