Experimentos sencillos sobre el tiempo

Micaela es una abeja muy aplicada y, al salir de la escuela, quiere merendar. Micaela, además de inteligente es hacendosa y sabe muy bien dónde se encuentra la comida, pero hay que ir a buscarla, de flor en flor. Por fin, ¡qué rica merienda! Y después ¡qué dulces sueños!

A fierce ogre finds that children are becoming too smart for him to catch and eat. Instead, he passes his time writing arithmetic problems to challenge the children.

Montañas que se elevan hasta el cielo, volcanes que cortan la respiración, desiertos insoportables, ríos interminables, salares inmensurables... ¡Más de 25 destinos para quienes deseen viajar hasta "lo más" de nuestro planeta!

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...