The 21-month trip to Mars poses a litany of problems, particularly keeping people healthy. Could hibernation be an answer?

The commonly named "flying!' squirrels and "flying" lemurs actually glide or parachute by means of a furred membrane, but only bats have the structural adaptations that allow for full powered flight.

More information: Andrew Orkney et al, Evolutionary integration of forelimb and hindlimb proportions within the bat wing ...

All species of Adirondack bats forage at twilight or at night, capturing insects which they detect by echolocation. They capture prey with their teeth, and by netting them with the tail membrane, or ...

The authors added, "We show that bats vibrate extremely thin and light membranes extending from their vocal folds to make their high-frequency ultrasonic calls for echolocation. To extend their ...

1). The saphenous (interfemoral) vein is found in the uropatagium (tail membrane) parallel to the femur (Fig. 2). The blood volume of bats comprises ∼10% of the total body weight (9.0–11.0 ml ...