Oxygen is necessary to sustain most terrestrial life. Oxygen is used in cellular respiration and many major classes of organic molecules in living organisms contain oxygen, such as proteins, nucleic acids, carbohydrates, and fats, as do the major constituent inorganic compounds of animal shells, teeth, and bone.
From wingtip to wingtip, P. sandersi measured at least 6.4 meters. The wandering albatross, the worldâs largest living bird, has a wingspan of 3.5 meters, and the giant, extinct South American condor, Argentavis magnificens, was right around 6 meters.
1 I think the biggest bird of flight today is the albatross..  Largest Flying bird living: Wandering Albatros with a 3.63m wingspan. (Andean Condor is 3.2m) Largest and heaviest flying extinct bird: Argentavis Magnificens: 7m wingspan (and not 3m Godfrey) and 70/78kg (150/172lbs).