“This new theory builds on the idea that around four billion years ago the Earth was struck by a Mars-like planet, but instead of the smash producing enough debris for one moon, this scientific essay argues there was enough for two.” (L. 7-11)

A pergunta cuja resposta está no trecho lido é

a) What was that planet like?

b) What were the moons made of?

c) When did another planet crash into the Earth?

d) How often did those collisions use to happen?

e) Why was there the creation of two moons?