Photos Martin Luther King Jr ...

Snow is made up of trillions of tiny ice crystals to make snowflakes, with not one alike. Here's how they form.

Wilson Bentley, a “bona-fide snowflake obsessive,” snapped close-ups of snowflakes in the late 1800s and early 1900s.

Snowflakes provide many of us with our earliest impressions of what it means to be unique. Even within a group—the flakes so ...

Snowflakes form when a drop of extremely cold water freezes on a dust or pollen particle in the sky, creating an ice crystal.

No two snowflakes are alike, and that’s even more true in the arctic temperatures we are seeing this week. These photos ...