The ancient Romans certainly had a hand--and foot--in the way we measure distance today, but modern technology has advanced measuring techniques considerably. Scientists have used nanotechnology to make the study of even minuscule distances more tangible. Readers discover this information and much more through text and illustrations as they learn about the concepts involved and the tools used to measure distance.

"Even if objects are about the same size, that doesn't mean they're the same weight. Readers will learn about many units that measure weight and about concepts such as density, gravity, and mass. With colorful photographs and engaging illustrations of ancient and modern scales, this book will help readers learn facts about weight, including how boats float and how weight is a factor in baking" --

"Not even a gigantic tape measure could capture the height of the tallest buildings in the world, so how do we know this information? Readers learn the answer to this question and more through fascinating photos and intriguing facts that introduce them to the units of height. Imperial and metric measurements are provided to guide readers as they learn about calculating altitude and estimating height. With real-world examples and problems to solve,...

"This playful picture book introduces young readers to different units of measurement, then invites them to think of the many creative ways to quantify the meaningful moments in their lives. How do you measure the time it takes to read a good book? Sure, you can use units of time, like minutes or hours . . . but you can also use your very own measurements: how many times you laugh or cry, how many pages you turn, or how many times you ask to read...

" Meet the man living alone in the mountains whose hobby of measuring snowfall led to a global understanding of climate change in this nonfiction picture book from celebrated mother-son team Jonah and Jeanette Winter. When billy barr came to the mountains as a young man, his only companions were a skunk and a pine marten. He needed something to fill the hours. So he began measuring the snow that fell. Day after day, and year after year, he measured....