"I think most people thought we would find at least one small moon - so far no new moons...!!" Singer wrote on Reddit. But the team discovered that a Pluto moon that we already knew about - Charon ...

But on Charon, Pluto's nearest moon, they found this most familiar of geological features. There was more, on Pluto itself, that recalled the American mid-west. Dark streaks on Pluto's plains ...