Alien: Covenant - 12 Big Questions After The New Trailer 

12. What Is This New World, And Who Populated It?

Once the Covenant crew make their landing, we're introduced to a lush new planet, one with stunning landscapes as opposed to the dirtier worlds of other Alien movies.

It then quickly becomes clear that someone has previously inhabited the planet, and somehow wheat is growing on it. There's also no sound, which might not be that surprising given it's an alien planet (why exactly would you expect to hear birds?) but is stranger given the signs of life in front of them.

If this is indeed the Engineers' world, what has happened to it since? How is wheat still growing, when there's apparently no other life around? And are the Covenant crew the first humans (outside of Dr Shaw) to come there?