"Why are there so many songs about rainbows?" sings Kermit the Frog in a song (about rainbows) called "Rainbow Connection" from 1979's "The Muppet Movie." And it's not just songs that feature rainbows ...

Can rainbows form in a circle? – Henry D., age 7, Cambridge, Massachusetts The legend goes that there is a pot of gold hidden at the end of every rainbow. But is there really an “end” to a ...