A Street Cat Named Bob is the autobiography of James Bowen's life on the street, and the story of the friend he find's in a cat he names Bob. I must admit Bob never stops amazing me in this book, he is so intelligent and loyal! I'd love to meet him myself and I can see why everyone who encounters Bob loves him, too.
The Silurian atmosphere shows a decline from carbon dioxide values of 1200 ppm in the Upper Ordovician. Budyko and others (1987) (see Fig. 8) indicated atmospheric oxygen declines from about 65 percent of PAL (Present Atmospheric Level) to about 35 percent of PAL in the Late Silurian.
Mars's thin atmosphere. The layers of Earth's atmosphere. An atmosphere (New Latin atmosphaera, 17th century, from Greek á¼ÏÎ¼ÏÏ [ atmos ] vapor and ÏÏÎ±á¿ÏÎ± [ sphaira ] sphere) is a layer of gases surrounding a planet or other material body of sufficient mass that is held in place by the gravity of the body.n atmosphere is more likely to be retained if the gravity is high and the atmosphere's temperature is low. The atmosphere of Earth is mostly composed of nitrogen.