Madrigueras de conejos (Inside Rabbit Burrows)

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Con el título "el arte industrial tardorromano", Aloïs Riegl abordó uno de los periodos más controvertidos de la historia del arte, un periodo considerado durante mucho tiempo como decadencia y falta de capacidad creadora. Riegl mostró de forma rigurosa que el arte tardorromano no es ni una prolongación residual ni un apéndice redundante en el arte romano. Para ello estudió la arquitectura, la escultura, la pintura y el arte industrial del periodo, redactando un texto ya clásico en el transcurso de la historia del arte y en su formación como disciplina científica.

Discusses the difference between secrets that are fun to keep and those that make people unhappy, and encourages youngsters to confide in their parents or another trusted adult such painful matters as bullying or improper touching.

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. Theyll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Dont worry, theyll be happy to learn that (hopefully) we have millions of years left!