sito internet a carattere scientifico, di astronomia, astrofisica, astronautica, fisica delle particelle, con oltre 4500 immagini, 500 articoli, dizionario, di, 850, termini, par ...
Educational and recreational puzzles for teachers, students and parents. 1000 puzzles collected, including Geometry, Logic, Math, Misc, Weight and Moves categories. Every puzzle ha ...
Howard Bloom's Global Brain is filled with scientific firsts. It is the first book to make a strong, solidly backed, and theoretically-original case that we do not live the lonely ...