¿Comen hierba los tigres?

¿Por qué los judíos son objeto de un odio particular?¿Cuándo apareció el antisemitismo? ¿Quiénes son los sabios de Sion? ¿Por qué Hitler detestaba a los judíos? ¿Existe un “negocio de la Shoah”? ¿El antisionismo es antisemitismo? Este libro no duda en hacer las preguntas más perturbadoras. Desarma con claridad y tranquilidad las ideas falsas, las trampas y las teorías del complot. Una guía indispensable para comprender las raíces del antisemitismo y reflexionar acerca de su actualidad.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

In 1991, preparation for the construction of a new federal office building led to a startling discovery: a skeleton. Further excavation exposed the bones of 420 men, women, and children. This area of New York had been a burial ground set aside for both free and enslaved Africans during the 1600s and 1700s. It’s thought to be one of the most important archaeological discoveries of the 20th century. This noteworthy book—which includes sidebars, fact boxes, a timeline, and maps—fills in the gaps of history books, exposing much about what life was like in colonial New York for Africans.

Did you know that swimming pools are used to train astronauts? Athletes use swimming pools to train when they're injured, and doctors use them to help patients feel better. Learn how swimming pools and aquatic therapy help all kinds of people! Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with career advice from a real person ...