In the central nervous system, there are three different layers that cover the spinal cord and brain. These are called the meninges, and their three levels consist of the: pia, arachnoid, and dura mater. Bone is situated above these layers, followed by periosteum (a fibrous membrane that covers bone) and skin.The dura mater is the top layer of the meninges, lying beneath the bone tissue.This material at times opens into sinus cavities (spaces) located around the skull.he dura mater is the top layer of the meninges, lying beneath the bone tissue. This material at times opens into sinus cavities (spaces) located around the skull.
Planet Earth Making Mountains Planet Earth filmmakers came out in the rugged mountains of Nepal in hopes of filming the elusive snow leopard for the Mountains episode. 01:51.
Plot Edit. Set in the fictional town of Dante's Peak, Washington, located in the northern Cascade Mountains, the film is somewhat based on the real-life eruptions of Mount St. Helens in 1980 and Mount Pinatubo in 1991.ante's Peak is a 1997 disaster film starring Pierce Brosnan, Linda Hamilton and Charles Hallahan and directed by Brandon Nichols.