Outstanding issues like devolatilisation and istotopic evolution are tied to the disk evolution, however its lifetime, dynamics and thermodynamics are unknown.

They may in fact have been disposed of more directly: pithecanthropoids certainly ate each other and are likely to have killed and eaten their weaker kin.

You are so cute, I could just eat you right up! Nom nom nom.

The small town was belted by cornfields in all directions.