Kategoria BISAC: Juvenile Nonfiction >> Technology - How Things Work/Are Made

Travel through time with the maestros as they explore the amazing history of timekeeping

Did you know that there is more than one calendar? While the most commonly used calendar was on the year 2000, the Jewish calendar said it was the year 5760, while the Muslim calendar said 1420 and the Chinese calendar said 4698. Why do these differences exist? How did ancient civilizations keep track of time? When and how were clocks first invented?

Find answers to all these questions and more in this incredible trip through history.

Dinosaurs are extinct now, but you can visit dinosaur skeletons in a museum. There you will meet Brachiosaurus, Stegosaurus, and Diplodocus and learn how they ruled the earth millions of years ago. You'll see dinosaurs with over 1,000 teeth, dinosaurs who could swim, meat-eaters and plant-eaters. And, of course, you'll meet the king of all dinosaurs, the gigantic Tyrannosaurus rex.

Don't jump

If you're on the space shuttle, that is. Astronauts never jump in space. They usually drink out of straws, and they lift tons of equipment as if it were light as air. Find out more in this information-packed voyage into space.

Birds don't need maps

Many birds make long journeys twice each year as they migrate between their winter and summer homes. Arctic terns fly more than 10,000 miles from the South Pole to northern Maine. Tiny little hummingbirds fly nonstop over the ocean for 500 miles. How do they know which way to fly? Why don't they get lost? Read and find out the many ideas scientists have come up with to explain this mystery.

Find out all about the many kinds of webs spiders spin in this level 2 Let′s Read and Find Out.

How do spiders spin such large webs? Spiders produce a unique silk that can stretch from wall to wall, or between the legs of a chair. In this book, featuring remarkably realistic artwork by S.D. Schindler, you will learn about the silk spiders produce, the webs they spin, and the prey they capture. You will even learn how to make a web of your own

Ages 5-9

There are forces at work whenever you throw a ball, run up the stairs, or push your big brotheroff the couch. Want to learn more about the forces around you? Read and find out

What if we could open up our planet and look inside? From its red-hot core to the highest mountain peak, come see Earth as you've never seen it before in a colorful introduction to the powerful forces shaping our home.

The inventions and inspiration of Benjamin Franklin and how they've stood the test of time

What would you do if you lived in a community without a library, hospital, post office, or fire department? If you were Benjamin Franklin, you'd set up these organizations yourself. Franklin also designed the lightning rod, suggested the idea of daylight savings time, and invented bifocals-all inspired by his common sense and intelligence. In this informative book, Gene Barretta brings Benjamin Franklin's genius to life, deepening our appreciation for one of the most influential figures...