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.
The world's largest ever bird revealed: 'Condor' with a 24-FOOT wingspan soared across the skies 28 million years ago. 1  Pelagornis sandersi was so heavy it could get off the ground by taking a running jump downhill into a headwind - much like a hang glider.  It would have weighed up to 180lbs (81.5kg) with stumpy legs.