Ice bubbles, Abraham Lake, at the foot of the Rocky Mountains in Canada. The rare phenomenon occurs each winter in the man-made lake, as the plants on the lake bed release methane gas, which freezes as it comes closer to the cold lake surface.
Photographer captures mesmerising images of magical ice cavern
Snowflakes or snow crystals form when ice crystals freeze around tiny particles of dust that are in the air, and join together as they fall. Ice crystals that melt as they fall become rain. Ice crystals that form near the ground are called frost.