Theia: the planet that our Earth might have devoured to create the Moon
Scientists believe that a massive collision between the young Earth and a planet-sized object known as Theia led to the formation of the Moon.
Theia: the planet that Earth may have 'swallowed', helping to form the Moon
Scientists propose Theia, a hypothetical planet, collided with Earth 4.5 billion years ago, leading to the formation of the Moon.