it is also the lightest element isotopes are atoms of the same element with different numbers of neutrons in ancient times the elements referred to fire earth water and air helium is the second most common element in the universe but is very rare on the earth
Featherweight is a weight class in the combat sports of boxing, kickboxing, mixed martial arts and Greco-Roman wrestling.
Featherweight (MMA) The featherweight division in mixed martial arts refers to different weight classes: UFC's and Pancrase's featherweight division, with an upper limit of 145 lb (66 kg) Shooto's featherweight division, which limits competitors to 135 lb (61.2 kg) ONE Championship's featherweight, limits between 146 and 155 lb (65.9 to 70.3 kg)