Ser un superhéroe Being a Superhero

La cultura medieval islámica ha dado figuras espléndidas. Omar Jayyam, poeta y filósofo, algebrista y astrónomo, es sin duda la más fascinante de todas. Su pensamiento fue heterodoxo, su saber inmenso, su obra variadísima. De lo que nos ha llegado de su poesía no siempre es fácil distinguir lo auténtico de lo apócrifo, y de lo que sabemos de su vida, la historia de la leyenda. Su más importante aportación algebraica, la resolución sistemática de las ecuaciones cúbicas cortando cónicas, se procurará poner al alcance de un lector moderno sin alterar las ideas de fondo.

Discusses the various features of Australia, including its climate, mountains, rivers, lakes, animals, vegetation, coral reefs, flightless birds, population, and cities, and history of the Aborigines.

This award-winning beginner's guide to the natural world of fish from the creators of the About... series was named an "NSTA Recommends" book. Noted educator and author Cathryn Sill uses simple, easy-to-understand language to teach children the basic characteristics of what fish are, how they swim, breathe, and reproduce, and explains the different ways they protect themselves from predators. With beautifully detailed, realistic paintings, noted wildlife illustrator John Sill introduces readers to the diversity of the fish population, from an Arctic char to a porcupine fish. An afterword...

"This book is something I wish I could have read when I was younger." --Roxane Gay, from the foreword of Feminism Is... It didn't just start with #MeToo. Today's feminism is more diverse than ever before and asks all kinds of questions. Combining insightful text with graphic illustrations, Feminism Is...tackles topics including intersectionality, the gender pay gap, the male gaze, and mansplaining. Find out what equality for women really means, get a short history of feminism, and take a look at the concerns affecting women at work, in the home, and around sex and identity. Get answers to the ...