INTRODUCTION Some people think dinosaurs were cold-blooded; other people think dinosaurs were warm-blooded. Lots of scientists have studied the problem. There is information about posture, bone structure, and brain/body size. This essay will consider the evidence and try to come to a reasonable conclusion. THE BIG DEBATE They were reptiles, so they must have been […]
Archive for August 25th, 2012
The Origin and Initial Rise of Pelagic Cephalopods in the Ordovician
August 25th, 2012 riffin
During the Ordovician the global diversity increased dramatically at family, genus and species levels. Partially the diversification is explained by an increased nutrient, and phytoplankton availability in the open water. Cephalopods areamong the top predators of todays open oceans. Their Ordovician occurrences, diversity evolution and abundance patternpotentially provides information on the evolution of the pelagic food […]