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Shark, any of numerous species of cartilaginous fishes that make up the order Selachii (class Chondrichthyes). Most species have a tough skin that is dull gray in color and roughened by toothlike scales. The mouth contains sharp triangular teeth. Sharks lack a swim bladder and must swim to keep from sinking.
The Anthropocene Working Group (AWG) was established in 2009 to see if there was a way to geologically differentiate an Anthropocene Epoch from the Holocene Epoch. The notion has always been preposterous because the only true difference between the Holocene and the preceding Pleistocene Epoch is the impact of humans on the planet. Otherwise, the Holocene has just been a run of the mill interglacial stage, geologically indistinct from the prior Pleistocene interglacial stages. After thirteen years, the AWG is finally prepared to present an official recommendation for an official Global Boundary...
News from 1993 is very old now. But even when it was news that year, the theme was old. As in very old.
James Hanna and Jonathan Hoag have been picking up rocks at Penn Dixie Fossil Park and Nature Reserve in Hamburg since they were kids. And now, in their 20s, they've
James Hanna and Jonathan Hoag have been picking up rocks at Penn Dixie Fossil Park and Nature Reserve in Hamburg since they were kids. And now, in their 20s, they've