Researchers Baffled After Mistaking Young Turtle Shells to be Oval-Shaped Plant Fossils, Bones Looked Like Plant Veins A ...

Scientists have described about 250,000 different fossil species, yet that is a small fraction of those ... and mainly the hard parts -- teeth, bones, shells, or wood -- were preserved.

Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

As this happened, the shell became a fossil ... Chris: You found some small fossils on the beach and I told you a little bit about them, and I said in the museum we'd see some bigger fossils.