The story of millions of years part 13
LATE CRETACEOUS Mongolia ….. 70 million years ago The massive trees cast massive shadows; oases of cool shade from the glaring sun, and to step between them was to step from night to day, eyes adjusting rapidly, pupils contracting to block out the dazzling light. Then, safely back beneath the canopy of heavy branches, those same muscles that had so recently closed would dilate, expanding the aperture of the pupils so that the hunter could once again see. The dinosaur had stepped from light to shade all day, its drab, downy plumage doing little to keep it cool, and it paused now, jaws open, stubby wings lifted, shedding heat, waiting until it had sufficiently recovered before it moved on. Evening or dawn were better hours to hunt; when the hot day had solidified into to a red gash across the sky, or the day proper had yet to begin, those misty, cooler hours before the sun fully rose; a time when larger creatures waited to bask in its rejuvenating rays. Not so Mo...