How do scientists study the moon that is out in space or tiny cells? When things are far away or very small, scientists use magnifying tools to help make things appear bigger and more clear.

Photographs and text explore such inventions as the wheel, gears, levers, clocks, telephones, and rocket engines.

Text and photographs introduce microscopic plant and animal life, viruses, microspores, and other forms of life which can only be viewed through a microscope.

Describes the animals inhabiting the polar regions of the world and how they have adapted to the climate there.