Video captured by a man in Maine shows unusual ice formations on a lake. The video from Lake Wassookeag in Dexter was shot last weekend by Reid Gray. It shows what look like ice bubbles frozen at ...

The lake typically freezes from mid-January to mid-February, depending on conditions like air temperature and wind, Roberts said. Last year, ice was first seen on the lake Jan. 14.

A clearer grasp of how ice bubbles form could also help scientists better understand the thermal and mechanical properties of bricks made from lunar soil, which could be used to build moon bases.

Once the entire lake reaches 39.2 degrees, the surface water cools further. When the temperature dips below 32 degrees, the water molecules slow down, forming a crystalline structure — ice.