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Asteroids and Meteorites
inbunden,
2009,
Engelska,
ISBN 9780816064694
Asteroids and comets are space objects that orbit the Sun. When they enter the Earth's atmosphere, they often make a streak of light known as a meteor, and if they are not burned …
Climate Change
inbunden,
2009,
Engelska,
ISBN 9780816064663
The Earth has experienced many episodes of dramatic climate change over the years. Scientists warn that the planet is currently becoming warmer at a rapid pace and there will be …