We know that the Moon formed when a Mars-sized protoplanet, Theia, slammed into Earth about 4.5 billion years ago. But what happened to Theia? A new study published in the journal Nature suggests that the remnants of Theia are inside the Earth. Please join astrophysicist Salman Hameed in this episode of Kainaati Gup Shup to talk about Theia and the origins of our Moon.