I heard in the Ramayana that mountains used to have wings at that time, but somehow all the mountains lost their wings, except for one mountain which was between India and Sri Lanka.
This mountain helped Lord Hanuman by letting him rest on itself for a while when he was flying towards Lanka in search of Goddess Sita. Although Lord Hanuman didn't take rest on the mountain, he did show respect towards the mountain for its kindness, by touching it with his toe.
So, is it true that mountains had wings? If yes, then how did they lose their wings?