Cuentos para crecer por dentro

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.

"Simple text and photographs describe common things that are blue, including blueberries, bluebirds, and blue jeans"--Provided by publisher.

Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

Every year, North Americans fly the American flag on June 14th. This show of patriotism isn't in anticipation of Independence Day; it's a different holiday entirely. Flag Day is a celebration of the adoption of the Stars and Stripes as the official flag. The book helps beginning readers learn about the American flag, how we take care of it, and how we honor it as a national symbol.