From the very first attempts by the Greeks to grapple with the complexities of our known world to the latest application of infinity in physics, The Road to Reality carefully explores the movement of the smallest atomic particles and reaches into the vastness of intergalactic space. Here, Penrose examines the mathematical foundations of the physical universe, exposing the underlying beauty of physics and giving us one the most important works in modern science writing.

    This book inspires girls with the stories of great women, from Elizabeth I to Serena Williams.

    "A good introduction to the subject."––BL. 1994 "Pick of the Lists" (ABA)Outstanding Science Trade Books for Children 1995 (NSTA/CBC)

     Twenty minutes a day is all you need, and within 100 teaching days your child will be reading on a solid second-grade reading level. It’s a sensible, easy-to-follow, and enjoyable way to help your child gain the essential skills of reading. Everything you need is here—no paste, no scissors, no flash cards, no complicated directions—just you and your child learning together. One hundred lessons, fully illustrated and color-coded for clarity, give your child the basic and more advanced skills needed to become a good reader.

    How did they come to inhabit the island? How long will they remain?  Thoroughly researched and filled with intricate and beautiful paintings, this extraordinary book by Award-winning author and artist Jason Chin is an epic saga of the life of an island—born of fire, rising to greatness, its decline, and finally the emergence of life on new islands.

    This isn't one of them." What it is, instead, is utterly interesting, antedotes (John Hancock fixates on salmon), from the inside out (at the Battle of Eutaw Springs, hundreds of soldiers plunged into battle "naked as they were born") close-up narrative filled with little-known details, lots of quotes that capture the spirit and voices of the principals ("If need be, I will raise one thousand men, subsist them at my own expense, and march myself at their head for the relief of Boston" -- George Washington), and action, It's the story of the birth of our nation, complete with soldiers, spies, salmon sandwiches, and real facts you can't help but want to tell to everyone you know.King George: What Was His Problem? is a 2009 Bank Street - Best Children's Book of the Year.

    Are you dying to find out what happens to food after you swallow it? Why dead people need a haircut? Which animals live on your eyelashes? This book will get right under your skin as the human body goes under the scalpel.

    As we enter the year 2000, zero is once again making its presence felt. Nothing itself, it makes possible a myriad of calculations. Indeed, without zero mathematicsas we know it would not exist. And without mathematics our understanding of the universe would be vastly impoverished. But where did this nothing, this hollow circle, come from? Who created it? And what, exactly, does it mean? Robert Kaplan's The Nothing That Is: A Natural History of Zero begins as a mystery story, taking us back to Sumerian times, and then to Greece and India, piecing together the way the idea of a symbol for nothing evolved. Kaplan shows us just how handicapped our ancestors were in trying to figurelarge sums without the aid of the zero. (Try multiplying CLXIV by XXIV). Remarkably, even the Greeks, mathematically brilliant as they were, didn't have a zero--or did they? We follow the trail to the East where, a millennium or two ago, Indian mathematicians took another crucial step. By treatingzero for the first time like any other number, instead of a unique symbol, they allowed huge new leaps forward in computation, and also in our understanding of how mathematics itself works. In the Middle Ages, this mathematical knowledge swept across western Europe via Arab traders. At first it was called dangerous Saracen magic and considered the Devil's work, but it wasn't long before merchants and bankers saw how handy this magic was, and used it to develop tools likedouble-entry bookkeeping. Zero quickly became an essential part of increasingly sophisticated equations, and with the invention of calculus, one could say it was a linchpin of the scientific revolution. And now even deeper layers of this thing that is nothing are coming to light: our computers speakonly in zeros and ones, and modern mathematics shows that zero alone can be made to generate everything.Robert Kaplan serves up all this history with immense zest and humor; his writing is full of anecdotes and asides, and quotations from Shakespeare to Wallace Stevens extend the book's context far beyond the scope of scientific specialists. For Kaplan, the history of zero is a lens for looking notonly into the evolution of mathematics but into very nature of human thought. He points out how the history of mathematics is a process of recursive abstraction: how once a symbol is created to represent an idea, that symbol itself gives rise to new operations that in turn lead to new ideas. Thebeauty of mathematics is that even though we invent it, we seem to be discovering something that already exists.The joy of that discovery shines from Kaplan's pages, as he ranges from Archimedes to Einstein, making fascinating connections between mathematical insights from every age and culture. A tour de force of science history, The Nothing That Is takes us through the hollow circle that leads to infinity.

    They tried wild things like drinking a glass full of millipedes or putting some mustard on one's head.  Some of the cures worked, and some of them…well, let’s just say that millipedes, living or dead, are not meant to be ingested.Carlyn Beccia takes readers on a colorful and funny medical mystery tour to discover that while times may have changed, many of today’s most reliable cure-alls have their roots in some very peculiar practices, and so relevant connections can be drawn from what they did then to what we do now.

    Born in Pisa, Italy, in the sixteenth century, Galileo contributed to the era's great rebirth of knowledge. He invented a telescope to observe the heavens. From there, not even the sky was the limit! He turned long-held notions about the universe topsy turvy with his support of a sun-centric solar system. Patricia Brennan Demuth offers a sympathetic portrait of a brilliant man who lived in a time when speaking scientific truth to those in power was still a dangerous proposition.

    Now readers can explore these ruins in this compelling Where Is? title.Built in the fifteenth century and tucked away in the mountains of Peru, Machu Picchu was abandoned after the Spaniards conquered the Incan empire in the sixteenth century. It remained hidden until 1911 when Hiram Bingham uncovered the marvelous complex and shared his discovery with the world. Today, hundreds of thousands of people visit the site to climb the 3,000 stone steps, explore the towering monuments, and see the numerous species that call these famous ruins home.

    -- School Library Journal

    With enthusiastic endorsements from bestselling luminaries as Lemony Snicket, Judith Viorst, Andrea Beaty, and many others, this entirely unique collection offers a surprise around every corner: from the ongoing rivalry between the author and illustrator, to the mysteriously misnumbered pages that can only be deciphered by a certain code-cracking poem, to the rhyming fact-checker in the footnotes who points out when "poetic license" gets out of hand. Adding to the fun: Lane Smith, bestselling creator of beloved hits like It's a Book and The Stinky Cheese Man and Other Fairly Stupid Tales, has spectacularly illustrated this extraordinary collection with nearly one hundred pieces of appropriately absurd art. It's a mischievous match made in heaven!

    Packed with math activities and puzzles, compelling stories of math geniuses, math facts and stats, and more, How to be a Math Genius makes the dreaded subject of math both engaging and relevant.

    Duplicate more than 65 popular toy store concoctions with common household ingredients for just pennies.