Un día de trabajo de un biólogo molecular (A Day at Work with a Molecular Biologist)

Presents general information about Christmas, including the origins of the holiday and other fall and winter holidays and their traditions, provides instructions for seasonal craft projects, and describes celebrations in different lands.

Presenta una selección de experimentos y actividades diseñados para enseñar los principios de la aviación y de la ciencia del espacio, que incluye fabricar un planeador, construir los instrumentos del vuelo, y diseñar y construir un cohete simple.

En esta ocasión Oda, acompañada de su amigo Henrick, vivirán mil aventuras dentro de las grandes películas del cine, pudiendo conocer de primera mano a los personajes, los actores y los directores cinematográficos más importantes.

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...