29,028 feet tall and still growing?! Even though Mount Everest measures 29,028 feet high, it may be growing about two inches a year. A mountain might be thousands of feet high, but it can still grow taller or shorter each year. Mountains are created when the huge plates that make up the earth's outer shell very slowly pull and push against one another. Read and find out about all the different kinds of mountains.

Explains how animals, birds, reptiles, and insects vary their markings and color to hide from their enemies and respond to their environment.

Explains how the water cycle leads to different types of weather patterns.

Describes the physical characteristics, behavior, and life cycle of crickets while giving particular emphasis to how they chirp.

Describes the nine planets and other bodies of the solar system; includes directions for making models showing the size of the planets and their distance from the sun.

Describes the parenting habits of the Maiasaura, a dinosaur whose way of raising children bore similarities to that of birds.

An introduction to reflex acts that explains why we sneeze, shiver, hiccup, and yawn.

Describes what fossils tell us about the physical characteristics and behavior of the large carnivorous Tyrannosaurus rex.

Examines space flight to Mars.