French lensmaker Essilor International SA agreed to buy Luxottica Group SpA, the maker of Ray-Ban sunglasses, for about 22.8 billion euros ($24 billion) in stock, combining the largest manufacturer and retailer in eyewear and creating an e-commerce contacts and eyewear powerhouse.
The Permian Period was the final period of the Paleozoic Era. Lasting from 299 million to 251 million years ago, it followed the Carboniferous Period and preceded the Triassic Period. By the early Permian, the two great continents of the Paleozoic, Gondwana and Euramerica, had collided to form the supercontinent Pangaea.
The Permian period lasted from 299 to 251 million years ago* and was the last period of the Paleozoic Era. The distinction between the Paleozoic and the Mesozoic is made at the end of the Permian in recognition of the largest mass extinction recorded in the history of life on Earth.n 1994, Jin et al. proposed a worldwide stratigraphy of the Permian Period made up of four series/epochs: the Uralian, the Chihsian, the Guadalupian, and the Lopingian. In the early 2000s, work by Jin and others resulted in the stratigraphy currently accepted by the International Commission on Stratigraphy.