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.
Earthâs original atmosphere was probably just hydrogen and helium, because these were the main gases in the dusty, gassy disk around the Sun from which the planets formed. The Earth and its atmosphere were very hot.Molecules of hydrogen and helium move really fast, especially when warm.arthâs original atmosphere was probably just hydrogen and helium, because these were the main gases in the dusty, gassy disk around the Sun from which the planets formed. The Earth and its atmosphere were very hot.