人们是怎么知道地球是圆的的？你也许会说是哥伦布航海发现的，但其实远在古希腊时期就有了地球是圆的的理论。 从船上的?t望台能看到在甲板上看不到的远方，月相变化，时差的产生，不同地方的人能看到不同的星空等等，这些都表明地球是圆的。 这本英语原版科普绘本提供了丰富有趣的知识，穿越历史，进入太空，启发孩子观察、思考有关地球形状的现象与知识，培养孩子独立思考的精神。 书后有简单的小实验，引导孩子自己动手、观察。

Jack and Annie continue their quest for the secrets of happiness in order to save Merlin. This time, the Magic Tree House takes them to the one continent they haven't visited before: Antarctica. Illustrations.

Every year like clockwork, animals both big and small aredriven by a natural instinct to move, in order to survive. On bothland and sea, they fight the odds and the forces of nature tobreed, feed, or lead and carry on for future generations. Thisreader is an introduction to the treacherous trek of the zebra,walrus, and Christmas Island red crab to overcome obstacles thatinclude hungry cheetahs, stinging yellow crazy ants, and even theirfellow species to make the often impossible journey of theirlives.

Traces life on earth through the geological strata, from the arrival of man back to the first plants. Gives us a remarkable grasp of the fossil record. Illustrates the geological periods from the present back to the earliest or Precambrian Era, and includes major developments and life forms of each time frame.

How hot is the sun? What is it made of? How long would it taketo get there? This fun- and fact-filled picture book answers thesequestions and many more. Follow the lead of two kids and a purplecat, who introduce astronomy in a child-friendly way. "Steve Tomecek brings fun and fact together with this nonfictionnarrative of Earth's closest star." —Washington Parent

Bats fly into the spotlight in this exploration of such basics as where the live, how mothers raise their pups, and how they hunt for food. Included as well is a simple plan for a building a backyard bat house.

Publisher Comments: Jack and Annie are off on another adventure! This time theyare sent to ancient Greece, where a very important event is takingplace. Join them as they race against time and witness the veryfirst Olympic games! About the Author Mary Pope Osborne grew up in the military, and by the timeshe was fifteen had lived in Oklahoma, Austria, Florida and fourdifferent army posts in Virginia and North Carolina. Aftergraduating from the University of North Carolina at Chapel Hill inthe early 1970's, Mary traveled all over Europe, and spent thefirst six weeks of her trip living in a cave on the island ofCrete. She then joined up with a group of European young people andtraveled in rickety vans through sixteen Asian countries, includingIraq, Iran, Afghanistan, Pakistan, India and Nepal. She was abartender, an acting teacher, a waitress, a travel agent, a windowdresser, and a medical assistant — all before becoming an author!Now she is the author of many highly acclaimed picture book

The tree house is back--but where is the enchantress Morgan le Fay? The search for her begins as Jack and Annie are transported back to ancient Japan, where they find themselves in the cave of a ninja master. Will the evil samurai warriors get to Jack and Annie before they can learn the secrets of the ninjas?

Ever wondered why elephants have trunks? Or why your legs lookshorter under water? And just why was football once banned? Thisbook answers a wide range of 'why' questions and provides furtherinformation with fun-filled facts. Appealing artworks help explainthe answers, allowing children to build up their knowledge on avariety of subjects.

Ms. Frizzle’s students are putting on a play about globalwarming, and they need some cold, hard facts. The Friz knows justwhere to find them! A hope on the Magic School Bus takes the kidson a whirlwind tour. From the Arctic to the equator, they seetelltale signs of climate change. But to get the really bigpicture, the class has to get really small – so they can seeexactly what is in the air and why it is making the world warmer.What they find gives them a real cause for concern!

Look around to see what uses oil—cars, airplanes, boats,factories, and countless other machines. The world is dependent onoil as its main source of energy. Although oil is plentiful rightnow, the supply will eventually run out, and even worse, burningoil is very damaging to the environment. What alternatives can helpus use less oil and how can we protect the environment? Read andfind out!

In the newest Magic Tree House adventure, Jack and Annie arewhisked back to the Civil War where they meet Clara Barton and savethe life of their very own great-great-great-grand-father.

This busy family needs a vacation, but they don't know whereto go.Mom and Dad want peace and quiet. Grandma wants to gosomewhere hot. Fluffer wants to go somewhere that pets can go, too!The pig-tailed narrator gathers all this data and makes a chart tohelp determine the perfect vacation destination. Learning math isfun when a vacation is the answer!