New photos of Mercury's mysterious north pole reveal a glimpse of the permanently dark, frigid craters that may hold ice dozens of feet thick, even though Mercury is the closest planet to the sun.

A spacecraft has beamed back some of the best close-up photos ever of Mercury’s north pole. The European Space Agency released the snapshots Thursday, revealing the permanently shadowed craters ...

But now scientists behind the mission are starting to trickle out high-resolution photos and videos taken ... first image of Jupiter's swirling north pole: "[I]t looks like nothing we have seen ...