Introduces the plants and animals that live in forests around the world, showing how their physical characteristics and behaviors help form an ecosystem.
Given its enormous girth, it’s not hard to believe that the 1,5-pound manatee is actually a marine relative of the elephant. This gentle giant and its habitat have been greatly harmed by humans, but m
Explains the history of written numbers, from ancient Roman numerals to the invention of the Hindu-Arabic numeral system and the spread of the Arabic numeral system around the world.
Introduces the plants and animals that live in meadows around the world, showing how their physical characteristics and behaviors help form an ecosystem.
