An ancient shark older than forests still glides through deep oceans today. Its strange teeth, slow life cycle, and ...
Despite multiple mass extinctions, the frilled shark has managed to thrive for 100 million years. Today, it remains one of ...
The fossil shark Ptychodus was first identified 190 years ago, but in the intervening centuries of paleontological inquiry, a comprehensive look at the ancient fish has been hard to come by. Until now ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback