More than likely, you’ve only seen a four-winged airplane in old photographs. Today’s airplanes usually have two wings, and if you’re lucky to see a four-winger, it’s probably an older aircraft anyway. But why did older airplanes have four wings, and why did that change to two?
Stop robocalls once and for all
Robocalls are not only annoying, but they scam Americans out of millions every year. Learn Kim's tricks for stopping them for good in this handy guide.