Just how did dinosaurs become extinct? Many scientists believe that a meteor came into the Earth's atmosphere and played a role in their disappearance. Learn more in Meteors, an AV2 media enhanced book.
Have you ever wondered what happens when the Moon moves in front of the Sun? How often does this occur? Learn more in Eclipses, and AV2 media enhanced book.
An introduction to constellations that explains what the constellations are, how they were deciphered in ancient times, how the sky was mapped out, what the signs of the Zodiac are, and why people study them.
