Sobre Las Limitaciones de Las Reinas

¡Imagina ver a cientos de animales de la misma especie en un mismo lugar a un mismo tiempo! Aquí en Norte América, muchos animales se agrupan en grandes masas en tiempos y lugares previsibles. No todas las migraciones están ligadas a cambios de fuentes de alimento - algunas están ligadas a los cambios de ciclos de vida. Ciertas aves, reptiles, mamíferos, anfibios, peces e inclusive insectos, emigran durante la primavera, el verano, el otoño o el invierno. Viaja junto con ellos mientras aprendes qué es lo que hace que estos animales estén Avanzando...de aquí para allá.

When many think of the Constitution, they think of the Founding Fathers: Thomas Jefferson, John Adams, Benjamin Franklin...but neither Jefferson nor Adams even signed it. Facts like this will surprise readers, while further information will enlighten them about both the crucial document called the U.S. Constitution as well as about its creation and ratification. This essential volume is a significant addition to any elementary social studies collection.

A stinky look at the history of personal hygiene reveals fascinating facts, such as the invention of the toilet, how many times Queen Elizabeth I had a bath, how the first sewers were built, and much more.

Advances in science have changed our world, all thanks to the scientists behind important discoveries. Some of the most important discoveries have come from female scientists, who were as unique for their work as they were for being trailblazers in a male-dominated industry. This text offers a biographical treatment of such important scientists as Marie Curie, Rachel Carson, and Jane Goodall, as well as others who have made it possible for women of the future to have a career in science. Age-appropriate text, fact boxes, historical and modern images, and a comprehensive timeline complete the...