Although they look human, all Asgardians possess certain superhuman physical attributes. They are extremely long-lived (though not purely immortal like their Olympian counterparts), aging at an extremely slow rate upon reaching adulthood (through the periodic consumption of the golden apples of Idunn). Asgardian flesh and bone is three times denser than similar human tissue, contributing to their superhuman strength and weight. An average Asgardian male can lift 30 tons (27.2 metric tons); an average Asgardian female can lift about 25 tons (22.7 metric tons). Asgardians are immune to all terrestrial diseases and resistant to conventional injury (however this resilience seems relatively incapable of defeating the zombie plague in Earth-2149 that affects even Asgardians). The metabolism of the Asgardians gives them superhuman stamina in all physical activities.