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.

CAPE CANAVERAL, Fla. (AP) — A spacecraft has beamed back some of the best close-up photos yet of Mercury’s north pole. The European and Japanese robotic explorer swooped as close as 183 miles ...

This image provided by European Space Agency shows close-up photos of Mercury's north pole taken by the European-Japanese spacecraft BepiColombo. (European Space Agency via AP) This image provided ...

CAPE CANAVERAL, Fla. (AP) — A spacecraft has beamed back some of the best close-up photos yet of Mercury’s north pole. The European and Japanese robotic explorer swooped as close as 183 miles ...