Wells, Robert E

"Inside every cell in the human body are tiny molecules that define all of a person's biological traits. [The author] explores DNA with curiosity and awe, pairing thrilling facts with clear explanations. Our human DNA might be 99% the same, but that last 1% difference makes each person unique"--Provided by publisher.

Presents an illustrated introduction to the Earth, describes the atmospheres of the other planets in the solar system, and explains the reasons why Earth is capable of sustaining life.

Compares the speed of various animals, from humans to cheetahs to peregrine falcons, with even faster things like rockets, meteoroids, and light.

Introduces the concepts of very large numbers, up to a googol, and multiples of ten.

Traces the history of measuring time, from the Stone Age to the twenty-first century.

Describes how global warming and greenhouse gases are contributing to rising arctic temperatures, and explains the repercussions and how it affects the animal populations that live there, which includes polar bears; and also details energy saving techniques.

Illustrates the concept of big, bigger, and biggest by comparing the physical measurements of such large things as a blue whale, a mountain, a star, and the universe.

Provides a simple introduction to the use of levers, pulleys, and wheels to move heavy objects.

Traces the history of measuring time, from the Stone Age to the twenty-first century.