Aerosteon
... that Aerosteon, a 9-metre (30 ft) long bipedal carnivorous dinosaur that lived approximately 84 million years ago, had air-sacs in its bones similar to those in the respiratory systems of modern birds?
... that <i id="mwFQg"><b id="mwFQk"><a href="./Aerosteon" id="mwFQo" rel="mw:WikiLink" title="Aerosteon">Aerosteon</a></b></i>, a <span about="#mwt46" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"9"},"2":{"wt":"m"},"adj":{"wt":"on"}},"i":0}}]}' id="mwFQs" typeof="mw:Transclusion">9-metre (30</span><span about="#mwt46" typeof="mw:Entity"> </span><span about="#mwt46">ft)</span> long <a class="mw-redirect" href="./Bipedal" id="mwFQw" rel="mw:WikiLink" title="Bipedal">bipedal</a> <a class="mw-redirect" href="./Carnivorous" id="mwFQ0" rel="mw:WikiLink" title="Carnivorous">carnivorous</a> <a href="./Dinosaur" id="mwFQ4" rel="mw:WikiLink" title="Dinosaur">dinosaur</a> that lived approximately 84<span id="mwFQ8" typeof="mw:Entity"> </span>million years ago, had air-sacs in its bones similar to those in the <a href="./Respiratory_system" id="mwFRA" rel="mw:WikiLink" title="Respiratory system">respiratory systems</a> of modern birds?