Los ciclos de vida de los mamíferos (Mammal Life Cycles)

Many insects hatch from eggs and molt several times as they grow bigger. Others, such as butterflies, undergo a complete metamorphosis. A common science curriculum topic, insect life cycles may be confusing because of these differences. However, this book breaks down these cycles into easy-to-understand steps in both accessible language and colorful diagrams readers can turn to for review again and again. The most important vocabulary needed to talk about insect life cycles is further explained in fact boxes and an extended glossary.

Ants are known as one of nature's hardest working animals. Their strength and persistence in bringing food to their colonies have been well documented. Now, beginning readers have a chance to learn about some of the littlest bugs in this volume written just for them. Complete with information about what ants eat, how they live, and generally how they stay so busy, this book is a must-have to satisfy the curiosity of your youngest naturalists. Eye-catching and unique photographs complement the low-ATOS text and aid in comprehension.

Garrapata, hombre barrigudo y con una pata de palo, es el terror de los ciudadanos de Londres, aunque por dentro es una buena persona. Un día le proponen que capitanee un barco pirata y no se lo piensa... se ha transformado en el Pirata Garrapata. ¿Qué divertidas peripecias le esperarán en el futuro? Original historia sobre un pirata gruñón que hará disfrutar con sus aventuras y viajes.

California became a territory in the United States when the Treaty of Guadalupe Hidalgo was signed in 1848. That treaty ended the Mexican War. Several days before its signing, gold was discovered at Sutter’s Mill in what is now Sacramento. The non-Native population of the territory was less than one thousand in 1848, but the gold rush increased that number to one hundred thousand by the end of 1849. The gold rush not only made many people wealthy, it brought ecologic devastation while speeding up California’s statehood. This book richly explores this interesting history.

A 2014 survey by the Substance Abuse and Mental Health Services Administration showed that 8.7 million youths ages twelve to twenty reported drinking alcohol beyond “just a few sips” in the previous month. Those who start drinking before age fifteen are five times more likely to become dependent on alcohol than those who begin at twenty-one. This resource shows young people how to help a friend who is abusing alcohol. It arms them with facts about alcohol, how it affects the teen mind and body, how to look for signs of a problem, and how to bring others on board to help.

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.