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.
rib. abdominal ribs, asternal ribs false r's. cervical rib a supernumerary rib arising from a cervical vertebra. false ribs the five lower ribs on either side, not attached directly to the sternum. floating ribs the two lower false ribs on either side, usually without ventral attachment.ib. any of the paired bones, 12 on either side, extending from the thoracic vertebrae toward the median line on the ventral aspect of the trunk, forming the major part of the thoracic skeleton. Called also costa. See anatomic Table of Bones in the Appendices.