This means that the condor doesn’t have to generate nearly as much lift as a reindeer would. The condor’s complex arrangement of skeleton, wings, and feathers allows it to stay aloft for hours at a ...

That presents more trade-offs: With longer wings, you can fit a bigger engine underneath each one. But the reindeer couldn't do any sharp turns. Smaller wings means using a smaller engine ...

Q. Why aren't there any wild reindeer in Pennsylvania? There are lots of deer. Alex, age 6, Harrisburg. A. Reindeer, which are known as caribou in North America, and the white-tailed deer in ...

Those appendages, usually used to “lock horns” with reindeer rivals during mating season, can also serve as wings that are independent of the wings on the sleigh. With the air rushing ...

A reindeer’s tapetum uses the same structure that makes the peacock’s iridescent feathers, the Morpho butterfly’s brilliant blue wings and the opal gem’s flashes of colour. This is called ...

This means that the condor doesn't have to generate nearly as much lift as a reindeer would. The condor's complex arrangement of skeleton, wings, and feathers allow it to stay aloft for hours at a ...