Book of Donmon Teith

Maps of The locations of asteroid craters on the earth on endpapers.

What are comets and where do they come from? This text examines the various theories, and goes on to look at the future. The authors discuss their belief that t

Fire on Earth reveals that comets have been a continuing problem throughout geological time. It examines the controversial claims that there are 'periodic extin

The reader's choices determine if survival is possible when a huge rock hurdles through space on a collision course with Earth.