Most Popular Books by ROBERT E. WELLS

There are trillions of stars in the universe, but we rely on our sun to provide (or contribute to) most of what we need to survive and thrive: heat, light, plants, animals, wind, and water. Complete with fun, cartoon illustrations, this book give kids plenty of information about our sun in an easy-to-read and digest format. By focusing on the needs of an elephant, Wells makes clear just how important the sun is to life on Earth.

A tiny difference in your DNA makes you one of a kind. Inside every cell in the human body are tiny molecules that define all of a person''s biological traits. Award-winning science author Robert E. Wells 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.

2000 Gold Seal Award, Oppenheim Toy Portfolio A Best Book for Children 2001, Science Books & Film You may be able to count all the way to one hundred, but have you ever counted to a googol? It''s impossible! In this fun book of numbers, Robert E. Wells explores the wonderful world of zeros and tells how the googol came to be named.

2024 Green Earth Book Award RECOMMENDED READING Dive into our oceans to learn why we need them—and why they need us. Our five oceans cover about 71 percent of the earth''s surface and hold about 97 percent of our water. A central part of the planet’s water cycle, oceans are essential to all living things. They are home to thousands of species, and they provide humans with food and medicine. Oceans are one of the world’s most valuable natural resources, and we must take care of them.

Oppenheim Toy Portfolio Gold Seal Award 2003 What would life be like with no clocks and no calendars? How would you know when to get up in the morning? How would you know when baseball season was about to start? Long, long ago, all people could do was watch the sun and moon and try to figure things out. Eventually, they made simple clocks like sundials. And as time marched on, people came up with more ways to measure it. Today, quartz crystal watches and atomic clocks tell us EXACTLY what time it is, at any moment, all over the world.

What''s faster than a cheetah?—no animal on earth can run faster. But a peregrine falcon can swoop faster than a cheetah can run. And the falcon can''t compare to an airplane, a rocket, or the speed of light. Lively text and watercolors will make children laugh while they learn all about speed.

2024 Green Earth Book Award Longlist Take a journey through the heart of the Amazon rain forest to discover why it''s so important for life on Earth. Even though rain forests take up less than 10 percent of Earth’s land, they are home to more than half the world’s plants and animals. In this adventure, readers climb aboard a river boat and tour the Amazon with a local guide. Observe howler monkeys, harpy eagles, and other wildlife as you discover how the planet’s largest tropical rain forest became endangered, and why it’s up to us to protect it.

Bengal tigers are an endangered species due to many human-caused factors, such as poaching, habitat destruction, and global warming. In Robert Wells''s signature style, this book explores these difficult topics in a child-friendly manner with endearing illustrations--and it gives kids ways they can help to save the tigers, too.

The moon does so much more than shine at night. Have you ever wondered how the moon was formed or why it changes shape in the sky? The moon''s story began 4.5 billion years ago, but it continues to affect everything we do today, from weather to timekeeping. Award-winning science author Robert E. Wells explains how and why the moon matters in our lives—and for the future of space exploration.

1996 CBC/NSTA Outstanding Science Trade Book A pygmy shrew is small—it''s among the littlest mammals! A ladybug is even smaller, but it hardly seems tiny when you compare it to a protozoa! And there are many things smaller still—so small that we can see them only with a microscope. Would you believe there are particles that are so tiny that we can''t measure their exact size? Explore the huge world of the very small!

The blue whale is the biggest creature on Earth. But a hollow Mount Everest could hold billions of whales! And though Mount Everest is enormous, it is pretty small compared to the Earth. This book is an innovative exploration of size and proportion.

Using fun facts and creative comparisons, science author Robert E. Wells answers some of humankind''s biggest questions about the world we live in. This collection of twelve STEM picture books by award-winning author Robert E. Wells will spark kids'' curiosity in our universe, from the time of dinosaurs to the present day. This collection includes e-book editions of Can We Share the World with Tigers?; Can You Count to a Googol?; Did a Dinosaur Drink This Water?; How Do You Know What Time It Is?; How Do You Lift a Lion?; Is a Blue Whale the Biggest Thing There Is?; Polar Bear, Why Is Your World Melting?; What''s Faster Than a Speeding Cheetah?; What''s Older Than a Giant Tortoise?; What''s Smaller Than a Pygmy Shrew?; What''s So Special about Planet Earth?; and Why Do Elephants Need the Sun?

If medals were awarded to animals for living a long time, then a giant tortoise would certainly win one. Some giant tortoises have lived for more than 150 years! Still, there are things on this planet much older than giant tortoises. Some of the giant sequoia trees that grow in California would be more than 3,000 years old. But the trees aren''t that old compared to the Barringer Crater in Arizona—that was made about 49,000 years ago. And it''s almost impossible to imagine that 65 million years ago, the T. Rex dinosaur roamed this planet—but we have the skeletons to prove it!

AV2 Fiction Readalong by Weigl brings you timeless tales of mystery, suspense, adventure, and the lessons learned while growing up. These celebrated children’s stories are sure to entertain and educate while captivating even the most reluctant readers. Log on to www.av2books.com, and enter the unique book code found on page 2 of this book to unlock an extra dimension to these beloved tales. Hear the story come to life as you read along in your own book.

It''s hard to imagine—the molecules in the glass of water you just finished might have once been part of a water hole that dinosaurs drank from! In this fascinating new book about the water cycle, readers will find that while it might be hard to imagine, it''s true. The author, Robert E. Wells, explains the complete water cycle and also discusses ocean currents, ocean and lake habitats, and hydroelectricity. He also touches on water pollution and our responsibility to keep our water clean. The author''s bright cartoon illustrations make this information especially appealing to kids.

Explore the functions of levers, wheels, and pulleys, and learn how to lift a lion, pull a panda, and deliver a basket of bananas to a baboon birthday party!

Move to another planet? Sounds interesting! In our imaginary spaceship, let''s check out the planets in our solar system. Mercury is closest, but it has no air, and it''s either sizzling hot or bitterly cold. The atmosphere on Venus is poisonous; plus, human beings would cook there. Mars might work, but you''d always have to be in a protective shelter. And if you got to the outer planets, you couldn''t even land as they are mostly made of gas! Our home planet is looking good. Why is Earth so comfortable for plants, animals, and people? As Robert E. Wells explains, it''s because of our just-right position form the sun, marvelous atmosphere, and abundant water. Our planet is very special and perfect for us, and that''s why we must do all we can to keep Earth healthy.

La musaraña es pequeña; de hecho es el mamífero más PEQUEÑO. ¿Hay algo más pequeño? Pues sí, una musaraña parecería un mamut al lado de una mariquita. A su vez, esa misma mariquita sería un gigante al lado de los protozoos. Desde luego los protozoos son

La ballena azul es enorme; de hecho, es el animal MÁS GRANDE que existe. Pero no es lo más grande que hay. Después de todo, quedaría pequeña en lo alto de una montaña. Y por grande que sea una montaña, no es más que un guijarro en comparación con toda la

El tiempo es algo misterioso. No puedes verlo. No puedes oírlo. No puedes atraparlo con una red y ponerlo en un tarro. Pero sabes que el tiempo existe, porque puedes sentir cómo pasa. ¿Cómo sería el mundo sin relojes ni calendarios? ¿Cómo sabrías que es hora de levantarse por la mañana? ¿Cómo sabrías cuántos días faltan para las vacaciones? Muy antiguamente, lo único que podía hacer la gente era mirar el Sol y la Luna y tratar de medir el tiempo. Transcurrieron los siglos, y los egipcios idearon los primeros relojes, muy simples: los relojes solares. Conforme ha ido pasando el tiempo, se han ido descubriendo métodos para medirlo. Hoy día, los relojes de cuarzo y los relojes atómicos nos pueden indicar la hora EXACTA en cualquier momento y en cualquier sitio del mundo. Con este libro aprenderás muchas cosas acerca de los misterios del tiempo.

¿Dirías que cien es un número grande? ¿Que dirías de mil? ¿Y de un millón? Estos números pueden parecer grandes… hasta que no descubres el googol. Pero hagas lo que hagas,¡ no intentes contar hasta un googol! Descubrirás el porqué en este libro sobre los grandes números. Aparte aprenderás los nombres de otros números y para qué los utiliza la gente. Un día a finales de los años treinta, Edward Kasner, un matemático americano escribió un número con cien ceros. No sabía cómo nombrarlo, así que le dijo a su sobrino de nueve años, Milton, que le pusiera un nombre. Milton le puso googol. Y así nació un googol. Con los años, el googol atrajo la imaginación de aquellos a quien les fascinan los grandes números. Pero, ¿Cómo de grande es un gogool?

¿Trasladarnos a otro planeta? ¡Parece interesante! En nuestro cohete imaginario, visitaremos los planetas de nuestro Sistema Solar. Mercurio es el más cercano, pero no tiene aire y además o te asas o te congelas en él. La atmósfera de Venus es venenosa. M

Fiction: What''s faster than a cheetah?--no animal on earth can run faster. But a peregrine falcon can swoop faster than a cheetah can run. And the falcon can''t compare to an airplane, a rocket, or the speed of light. Lively text and watercolors will make children laugh while they learn all about speed. Nonfiction: Did you know that the cheetah is the fastest animal that lives on land? The cheetah''s tail helps it make quick turns. Learn these and other interesting facts in A Cheetah''s World.

This set of grade 2 math resources covers understanding addition and subtraction; measurement and shapes; solving story problems; triangles and quadrilaterals; addition to 200; time; tables and graphs; diagonals and midpoints; subtracting 2-digit numbers; shapes and patterns; 3-digit addition and subtraction; metric measurement and 3-D shapes; multiplication and fractions; non-standard and standard units of measure.

Describes the history of time measurement and various devices used to measure time.

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.

A l’Àrtic, cada vegada es fon més gel a l’estiu. Això representa molts problemes per als óssos polars, perquè necessiten el gel per poder sobreviure, i, a més, molts problemes també per a tots, perquè tot el planeta necessita el gel de l’Àrtic per manteni