Uranus and Gaea produced two distinctly different races of beings called Giants and Titans. The Giants personified brute strength alone, but the Titans united to their great physical power intellectual qualifications variously developed. There were three Giants, Briareus, Cottus, and Gyges, who each possessed a hundred hands and fifty heads, and were known collectively by the name of the Hecatoncheires, which signified hundred-handed. These mighty Giants could shake the universe and produce earthquakes; it is therefore evident that they represented those active subterranean forces to which allusion has been made in the opening chapter. The Titans were twelve in number, 6 males and 6 females; their names were: Oceanus, Coeus, Crius, Hyperion, Iapetus, Cronus, Theia, Rhea, Themis, Mnemosyne, Phoebe, and Tethys. From these Titans was born a second generation. There are many, but some of the most famous of these new Titans include: Atlas, Helios, Leto, Prometheus, and Selene.