Some old-time scientists thought that because they were so big, all they could do was float in water. Boy, were they wrong! Even today, once-common notions about dinosaurs are being revised as new discoveries are made. This lively book about the perennially popular subject of dinosaurs offers fascinating insight into how certain theories were formed, and then how those theories were proved or disproved. It demonstrates that scientific thought is as creative as it is logical and invites budding scientists to come up with their own ideas.

    Is there enough time? You have 3 shirts and 2 pairs of pants. Can you make 1 good outfit? Then you start to wonder: Why does everything have to be such a problem? Why do 2 apples always have to be added to 5 oranges? Why do 4 kids always have to divide 12 marbles? Why can't you just keep 10 cookies without someone taking 3 away? Why? Because you're the victim of a Math Curse. That's why. But don't despair. This is one girl's story of how that curse can be broken.

    She lived in a world of silence and darkness and she spent the rest of her life struggling to break through it. With the help of teacher Annie Sullivan, Helen learned to read, write, and do many amazing things. This inspiring illustrated biography is perfect for young middle-grade readers. Black-and-white line drawings throughout, sidebars on related topics such as Louis Braille, a timeline, and a bibliography enhance readers' understanding of the subject.

    Is that the mast of a shipwreck? A faded pirate hat? And what's that hiding in the sand? A mandible and a clavicle, phalanges and femurs, a tibia and a fibula -- could there be a set of bones scattered across the ocean floor? And who might they belong to? A jaunty rhyme takes readers on an underwater scavenger hunt as a comical skeleton tries to put itself back together piece by piece. Make no bones about it: this rollicking read-aloud will have young ones learning anatomy without even realizing it.

    But how do you count zero, a number that is best defined by what it's not?Can you see it?Can you hear it?Can you feel it?This important math concept is beautifully explored in a way that will inspire children to find zero everywhere--from the branches of a tree by day to the vast, starry sky by night.

    Regarded as the world’s first geneticist, Mendel overcame poverty and obscurity to discover one of the fundamental aspects of genetic science: animals, plants, and people all inherit and pass down traits through the same process, following the same rules. Living the slow-paced, contemplative life of a friar, Gregor Mendel was able to conceive and put into practice his great experiment: growing multiple generations of peas. From observing yellow peas, green peas, smooth peas, and wrinkled peas, Mendel crafted his theory of heredity—years before scientists had any notion of genes. Children will be inspired by Gregor’s neverending search for knowledge, and his famous experiments are easy to understand as an introduction to genetics. F&P level: Q

    Here is the incredible story of Elizabeth, a real-life elephant seal who made her home in the Avon River in the city of Christchurch, New Zealand. When Elizabeth decides to stretch out across a two-lane road, the citizens worry she might get hurt or cause traffic accidents, so a group of volunteers tows her out to sea. But Elizabeth swims all the way back to Christchurch. The volunteers catch her again and again—each time towing her farther, even hundreds of miles away—but, still, Elizabeth finds her way back home. Includes back matter with information about elephant seals.From the Hardcover edition.

    A story about the mighty saguaro cactus.

    Years passed before Eleanor began to discover in herself the qualities of intelligence, compassion, and strength that made her a remarkable woman. In Eleanor, two-time Caldecott Medal winner Barbara Cooney paints a meticulously researched, lushly detailed picture of Eleanor's childhood world--but most importantly, she captures the essence of the little girl whose indomitable spirit would make her one of the greatest and most beloved first ladies of all time. "There are many biographies of Eleanor Roosevelt, but this one is special?Cooney is at her artistic best." --Booklist

    Readers will learn about various animal dads and their many different parenting skills: baby-sitting - an emperor penguin dad watches over the eggs for nine weeks while the mother searches for food; hunting - a wolf dad leads the pack on hunting trips and brings meat for new pups to eat; giving birth - a seahorse mother's eggs hatch inside the dad's special belly pouch. Sneed Collard's concise, clear text and award-winning artist Steve Jenkins's informative cut-paper collages reveal unique tasks that animal dads perform in raising their offspring.

    in full color. "The drama of natural disasters provides prime material to entice young independent readers. In this volume, the account of the eruption of Mount Vesuvius describes village life 2,000 years ago, the eruption itself and its aftermath, and the excitement when the buried town is rediscovered centuries later. A lively and factual glimpse of a devastating moment in history, in an accessible, attractive package."--Publishers Weekly.

    The last two teachers of this class quit in frustration. The students--a bunch of energetic young men--are bored with all the regular games and activities. Naismith needs something new, exciting, and fast to keep the class happy...or someone's going to get hurt. His only resources are a gymnasium, a couple peach baskets, some soccer balls, and his imagination. Saving this class is going to take a genius. Discover the true story of how Naismith invented basketball in 1891 at a school in Springfield, Massachusetts.

    What is creating this revolting smell? The answer is gross: the river is full of poop. But the smell isn’t the worst problem. Every few years, cholera breaks out, and thousands of people die. Could there be a connection between the foul water and the deadly disease? One engineer dreams of making London a cleaner, healthier place. His name is Joseph Bazalgette. His grand plan to create a new sewer system to clean the river is an engineering marvel. And his sewers will save lives. Nothing stinky about that.

    She goes on to explain that even one tree is nice, if it is the only one you happen to have.Some of the reasons why trees are so good to have around are funny. Some are indisputable facts. But in all of them there is a sense of poetic simplicity and beauty which will be sure to entrance any young child. Whether he knows one tree or many, he will relish the descriptions of the delights to be had in, with, or under a tree.Marc Simont's joyous pictures, half of them in full color, accentuate the child-like charm of the words. And each painting of a tree or trees shows just how very nice they can be.

    SEE INSIDE AN AMAZING 14TH-CENTURY CASTLEFrom the creators of INCREDIBLE CROSS-SECTIONSWHY...did castles have wooden walkways around the top of their walls?...did one castle attacker set fire to 40 dead pigs?...was the longbow such a fearsome weapon?WHO...was a "gong farmer"?...catapulted animals over the castle walls?...ate elaborate dishes of porpoise and peacock?WHAT...was strewn on castle floors?...was a quantain?...was a squire's job?Follow the story of life in the castle in both peace and war - and find the enemy spy!