Can birds fly in vacuum?
399542
Only in an upright one, not in an horizontal one.  Oh an dont turn it on. ;->
460221
No.  Among other issues, human bones are too dense to fly.  If you look at the bones of a bird, they are completely different.  Also, our arms do not pivot in their sockets in the same way as wings, and we have no breastbone and keel to withstand the tension of flapping even if we had such arms, and we lack feathers.
276580
No. I believe plants require a carbon dioxide gas in an atmosphere to be able to perform photosynthesis so in a vacuum a plant would die.
274732
I can't believe how many people actually think there is any truth to this idea. Bats in flight can turn any direction they choose. If that was not true they would never be able to navigate long distances into twisting cave passages to roost during the day. Further, when feeding they are quite aerobatic. Some smaller bats can even hover like a humming bird. When camping I have often used a flashlight shining straight up into the air to attract insects and watch the bats fly through the beam of light to catch the bugs. They turn quickly and in any direction.\n\nI checked the Bat Conservation International website which is maintained by some of the best bat biologists around, and found nothing about this idea.\nhttp://www.batcon.org/home/default.asp\n\nAlso refer to:\nhttp://fi.edu/wright/again/wings.avkids.com/wings.avkids.com/Book/Animals/instructor/bats-01.html
512347
Generally it's called a V formation, and it's usually geese (Canada geese are common geese that you'd see). Ducks also fly this way, although I usually see them in pairs.\nBirds fly this way because it's more aerodynamic. The bird in front is essentially plowing the way through for the rest of them. The ones behind fly in its "wake". They take turns being the lead bird since that's the hardest position to be in.
497390
No, we couldn't fly if we had wings. We're much to heavy for one thing. Flying birds have hollow bones and many other adaptations for flight (like a "keel" on their breastbone that the flight muscles attach to and specialized respiratory systems). It's a good thing we're smart enough to make things like planes, because that's the only way we're getting in the air.
11899
Venturing a guess here:\n\nCholesterol hardens you veins, and birds, due to the energy requirements of flight, need incredibly high blood pressure.  Bird lungs have a seperate entrance and exit, unlike mammalian lungs where CO2 goes out the same way O2 comes in.  The higher effeciency is necessary to power the large pectoral muscles.  I'd imagine that if there oxygen demands were that high, they'd need some strong blood vessels to carry their blood at high pressure.
56061
Yes, if that is the direction they are flying. If the wind changes direction though they don't change. So not ALL the time as the question implies.
433650
Birds fly south because it is instinct. I hope that answers your question.
993555
In a vacuum, both objects will land at the same time.
755713
No, you don't tend to wonder these things when you know why.\n  \nIt's to do with the air currents.  By flying in a V formation the birds behind save up to 30% of energy.  When the leading bird gets tired he drops out and goes to the end of the formation and one of the birds next in sequence takes his place, so they still maintain the V formation.  This process continues until all the birds come to rest.\nIf a bird gets injured and needs to land to earth, two other birds will also break away and stay with the injured bird until he gets well or until he dies, before resuming their flight.
779454
Wild turkeys can fly.  However, they don't typically fly more than a quarter mile or higher than fifty feet up.  In fact, wild turkeys can fly up to 50mph.  \n\nDomesticated turkeys cannot fly though.  Due to husbandry techniques that enhance muscle volume, they are simply too heavy to fly.
1151649
Polar orbits are lower, Geo stats are higher. Polar orbits orbit over the poles, in a N-S orientation.\n\nGeo Stat sattelites are stationary over one point of the earth. The orbital period of an Earth satellite increases with height, and at a height of about 35786 km the period is exactly one day. If the satellite is in the equatorial plane and moving in the direction of the Earth's rotation then it will remain almost fixed above some point on the equator (but in practice frequent small corrections are needed to achieve this precisely). \n\n\nBirds do need oxygen, when flying, but the lungs and air sack allow birds to continuously inhale oxygenated air into the lung. The birds do not 'exhale', the CO2 rich air is expelled through airsacks.\n\nSo, airsack helps bird in  inhaling, without exhaling CO2.
361693
Nope.  A vacuum (not "vacume") means that there's not any air to begin with, and because a fan cannot produce air, only move it around, no air will be given off.
299785
Wild turkeys can fly.  Most Galliformes (the Order that chickens and turkeys belong to) are primarily ground birds, that can fly only short distances.  Their flight muscles are mostly glycogen rich fast-twitch muscle fibres that provide a lot of power for short periods of time.  We humans happen to find the white meat of these muscles tasty, so they have become popular domesticated animals.\n\nAs they were domesticated, selective breeding to increase the size of these muscles has resulted in huge domestic turkeys that are too heavy to lift themselves off the ground.\n\nSome breeds of domestic chicken can still fly because although they have also been bred for breast size, they are generally smaller animals and haven't yet reached the point at which they are too massive to lift.  \n\nBut, as Arthur Carlson discovered, domestic turkeys fly about as well as bags of wet cement.
191108
Definitely Vacuum. Because space, that is vacuum space has no mass. Because of that factor, WE, can basically, "FLY" in outer space....
391527
They could. There were fish that evolved from swimming to walking. There is a fish called the flying fish that can jumpfrom the water and glide through the air for a ways to escape predators. Follow the link to see a picture, its fins look very similar to wings.\n\n\nhttp://oceanlink.island.net/oinfo/biodiversity/flyingfish/flyingfish.html