Mi primera gran enciclopedia

In 1848, gold was discovered in California, attracting over 300,000 people from all over the world, some who struck it rich and many more who didn't. Hear the stories about the gold-seeking 'forty-niners!' With black-and-white illustrations and sixteen pages of photos, a nugget from history is brought to life!

Discover Dinosaurs Spanish Edition. Dinosaurs were reptiles that lived millions of years ago. It was a long time before there were any people on the earth. Scientists have looked at dinosaur bones and found out many things about what they were like. Nobody knows why the dinosaurs disappeared. People have made pictures to show what they might have looked like. What do we know about dinosaurs?

Defender la Luz Mientras el mundo occidental caía en la oscuridad, ella se atrevió a defender la luz. Hipatia de Alejandría, nacida en el año 355, tras el reinado de Constantino, vivió en un Imperio Romano que se derrumbaba, un mundo en el que la obediencia a las autoridades religiosas triunfaba sobre la ciencia, en el que la razón y la lógica amenazaban el nuevo orden mundial. Era un mundo al borde de la Edad Media, un mundo que decidía la cuestión de la ciencia versus la religión, la libertad versus la ortodoxia, la tolerancia versus el odio. Durante más de 40 años, Hipatia se...

Describes how the rig was built, how it stands out in the water, and how much drilling it does in a day.