"The earth is round, so why don't some people hang upside down? The answer is gravity! Young readers can explore the concept of gravity with vibrant, full-color photos, clear text, and critical thinki
"Did you know that light travels on waves? It helps us see in the dark, it brings color to our world, and it moves through the air faster than sound!"--
Describes some of the features of the Moon, including its rotation around the Earth once a month, craters that result from being hit by rocks from space, and the different phases of the Moon caused by
