Aurora effect is known as the aurora borealis or the northern lights. The former term was coined by Galileo in 1619, from the Roman goddess of the dawn and the Greek name for the north wind. The southern counterpart, the aurora australis or the southern lights, has features almost identical to the aurora borealis and changes simultaneously with changes in the northern auroral zone. The Aurora Australis is visible from high southern latitudes in Antarctica, Chile, Argentina, New Zealand, and Australia. A geomagnetic storm causes the auroral ovals (north and south) to expand, and bring the aurora to lower latitudes. The
Dimetrodon borealis the sabre-armed jaws completed the sanguinary work of destruction." American paleontologist E. C. Case reclassified "Bathygnathus" as a pelycosaur (a type of "mammal-like reptile") in 1905, noting its similarities with the genus "Dimetrodon", a sail-backed synapsid that was discovered in Texas in the 1870s. In their 1940 overview of pelycosaurs, Alfred Romer and Llewellyn Ivor Price suggested that "Bathygnathus" might be synonymous with "Dimetrodon". Dimetrodon borealis Dimetrodon borealis, formerly known as "Bathygnathus borealis," is an extinct species of pelycosaur-grade synapsid that lived about 270 million years ago (Ma) in the Early Permian. A partial maxilla or upper jaw bone from