Derecho de las obtenciones vegetales

Explains, in simple terms, the reasons for skin color, how it is determined by heredity, and how various environmental factors affect it.

Mars is perhaps the most thrilling planet these days. With rovers exploring its surface and manned missions in the works, people are wondering if Mars is our next home! In this highinterest book, readers will learn more about Earth's neighbor, including what its climate and surface are like, why it's called the Red Planet, and about the recent discovery of water on its surface. They'll learn all this while solving "Your Mission" math problems that complement and support the text. This motivating volume is an engaging way to explore key aspects of science and math curricula.

Children often wonder what they were like when they grew up in their mother's womb. Discover the magic and beauty of the beginning of life in nine three-dimensional illustrations of a baby in real size, month by month. This book is a great way to explain to children how their life was in their mother's womb and is the perfect gift for the arrival of a new baby.

La Biblia ha sido objeto de diversos estudios y reflexiones. Esta es una narración de los hechos más destacados de la historia de la salvación o historia sagrada, redactada en forma anecdótica, al alcance de todos, como lo expresa su título. Cada acontecimiento bíblico aquí narrado, constituye un capítulo que concatenado con otros, según el orden bíblico, nos permiten recorrer, aplicando a nuestra vida y a nuestra historia, la historia salvífica comprendida entre la creación, según el libro del Génesis y la recreación o cristificación del universo.