Albertosaurus older "Gorgosaurus libratus" (sometimes called "Albertosaurus libratus"; see below). These two species are the only described albertosaurines; other undescribed species may exist. Thomas Holtz found "Appalachiosaurus" to be an albertosaurine in 2004, but his more recent unpublished work locates it just outside Tyrannosauridae, in agreement with other authors. The other major subfamily of tyrannosaurids is the Tyrannosaurinae, which includes "Daspletosaurus", "Tarbosaurus" and "Tyrannosaurus". Compared with these robust tyrannosaurines, albertosaurines had slender builds, with proportionately smaller skulls and longer bones of the lower leg (tibia) and feet (metatarsals and phalanges). Below is the cladogram of the Tyrannosauridae based on the phylogenetic
Bones of the Earth paradox, its tangles and attenuations mercifully forgotten, a love of the world is retained - a deep unselfish love of learning the world and all its creatures. Bones of the Earth Bones of the Earth is a 2002 science fiction novel by Michael Swanwick. It was nominated for the Nebula Award for Best Novel in 2002, and the Hugo, Campbell, and Locus Awards in 2003. Expanded from his Hugo Award-winning story "Scherzo with Tyrannosaur", "Bones of the Earth" spans geologic time, not just centuries but millennia, from the pre-historic past to the distant and unknown future. Most of the novel's