Another snake's tale - Indra and Vritra

The Yahweh vs Leviathan story is all about slaying that pesky old religion and asserting the power of the new over the old. Same with Zeus defeating Typhon. It's the new Greek Olympian pantheon defeating the old Pelasgian earthy religion. No surprise then that there's a similar Vedic story, where our hero Indra defeats the old (Dravidian) dragon Vritra. Like Zeus, Indra had thunderbolts to aid him. Inderestingly Indra is etymologically related to tundra or thunder if you like. Whilst not cognate with Thor, it's an interesting connection.