Blue Mars (Mars Trilogy, #3)

by Kim Stanley Robinson

As Nirgal ascended he saw that most of the fliers wore birdsuits of one sort or another; it looked like he was flying in a flock of wide-winged flying creatures, which resembled not birds but something more like flying foxes, or some mythic hybrid like the griffin or Pegasus: bird-humans. The birdsuits were of several different kinds, imitating in some respects the configurations of different species—albatross, eagle, swift, lammergeier. Each suit encased its flier in what was in effect an ever-changing exoskeleton, which responded to interior pressure from the flier’s body, to take and then hold positions, or make certain movements, all reinforced in proportion to the pressure exerted inside them, so that a human’s muscles could flap the big wings, or hold them in place against the great torque of the wind’s onslaughts, meanwhile keeping the streamlined helmets and tail feathers in the proper positions.