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Known as the Spiral Saw, the Helicoprion is said to have lived during the Carboniferous period and was one of the few creatures able to live through the Permian-Triassic extinction event (‘The Great Dying’). Eventually the Helicoprion went extinct during the Triassic period. It had teeth like a circular saw, connected on the lower jaw. As new teeth grew, the older teeth were pushed out and into the middle to create the spiral. Length-wise the creature was said to be 10-15 feet.

Pretty sea shell bouquet for beach wedding...

Gelin Buketlerinde Yeni Trendler

Strange deep-sea fish - mysterious messenger in the dark world (23

Beautiful Beach Sunsets!!! ♥. Simply amazing. beach picture idea

berry-break-0 : theBERRY

This looks lovely...