THE chimaera Hydrolagus colliei, commonly known as the ratfish, is one of the few remaining members of the sub-class Holocephali. The chimaeras are the only survivors of a large and diverse Palaeozoic ...

I'm Greg Laden, and I usually blog at here at Scienceblogs.com and Quiche Moraine. I'm a biological anthropologist interested in human evolution, the biologies of race and gender, human ...

Sharks like hammerheads or great whites might usually enjoy the most time in the limelight, but this past weekend, all eyes have been on the mysterious "ghost shark." While not technically a shark – ...