El fantasma negro

Los héroes de ficción que viajan en el tiempo pueden cambiar el pasado o el futuro. ¿Podrán hacerlo los seres humanos en el futuro? A medida que los científicos aprenden más sobre las personas y el universo, comienzan a darse cuenta de que algunas formas de viaje en el tiempo podrían ser posibles. Fictional heroes who time travel can change the past or the future. Will humans be able to in the future? As scientists learn more about people and the universe, they're starting to realize that some forms of time travel might be possible. Now in Spanish!

Why do continents matter? From economics to weather science—and everything in between—knowing the characteristics of the continents expands readers’ perspectives in every school subject. This fundamental information is a building block of many future lessons and an essential part of elementary education. This book presents a focused, clear, age-appropriate look at Earth’s continents that young readers are sure to find both informative and interesting. This volume is also packed with colorful maps that are labeled and explained to foster young readers’ comprehension of this important...

The Spanish-language edition of The Skeleton Inside You explores the wonders of humans' more than two hundred bones and how they keep people standing upright and walking forward. Simultaneous.

Plants are living things that grow and change. Over time, plants have made remarkable adaptations to suit the habitats in which they live. Simple text and beautiful images highlight how plants have adapted to life in the Arctic, in aquatic environments, and in other habitats such as those in deserts and grasslands.