The James Tiptree Jr Award-winning novel. Change or die. These are the only options available on the planet Jeep. Centuries earlier, a deadly virus shattered th

The beautiful spiral shells of these long-extinct marine invertebrates are among the most sought after and recognizable of fossils, yet little has been publishe

Ammonites are extinct marine animals related to present day squid, octopi, and chambered nautilus. Contains descriptions of more than 90 species that lived for