Dura mater. Dura mater, or dura, is a thin membrane that is the outermost of the three layers of the meninges that surround the brain and spinal cord. It is derived from mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater.ura mater. Dura mater, or dura, is a thin membrane that is the outermost of the three layers of the meninges that surround the brain and spinal cord. It is derived from mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater.
The story with the most credibility is the one that, the PiÃ±a Colada was introduced on August 15, 1954 at the Caribe Hiltonâs Beachcomber Bar in San Juan, Puerto Rico by its alleged creator, Ramon âMonchitoâ Marrero.
The pharmacy of Caleb Bradham, with a Pepsi dispenser. The drink Pepsi was first introduced as Brad's Drink in New Bern, North Carolina, United States, in 1893 by Caleb Bradham, who made it at his drugstore where the drink was sold. It was renamed Pepsi Cola in 1898 after the root of the word dyspepsia and the kola nuts used in the recipe.