Los hoyos negros y la curvatura del espacio tiempo

Hace doce milenios, la era de las grandes glaciaciones terminó con importantes oscilaciones en el clima y se produjo una era geológica denominada Holoceno. Se cree que hubo grandes erupciones volcánicas o el impacto de un gran meteorito, por lo que los humanos que habitaban la tierra debieron adaptarse a las nuevas circunstancias ambientales. Nuestros antepasados vivieron entonces el cambio más profundo de la especie humana: empezaron a criar animales y cultivar, lo que implicó dejar de vivir de forma errante y establecerse en poblados estables. Desde ese momento el hombre ha vivido una...

Biographies and bibliographies of members are included in many of the volumes. Lists of members are usually given on covers of the numbers.

With a new afterword, Why You Are Here- A speech on the opening of the COP26 climate summit As a young man, I felt I was out there in the wild, experiencing the untouched natural world - but it was an illusion. The tragedy of our time has been happening all around us, barely noticeable from day to day - the loss of our planet's wild places, its biodiversity. I have been witness to this decline. A Life on Our Planet contains my witness statement, and my vision for the future - the story of how we came to make this, our greatest mistake, and how, if we act now, we can yet put it right. We have...

Science curriculum for the primary and elementary grades featuring a text that students can write in.