Libia E Barajas Mariscal Libros

With imaginative text and extraordinary illustrations, the reader is introduced to the functioning of the bodys immune system and the importance of preventing illnesses.

Although we cannot see it, many people think that time has a shape. Some say that it is like a circle and others claim that it seems to be a direct line. This dazzling book intersperses historical and cultural information with the discoveries and data gathered by astronomers and mathematicians who have made the measuring