You might say Ken Libbrecht is into snowflakes. In fact, they're one of the main subjects he studies in his lab at Caltech. He's even got a high-tech snowflake machine, which he uses to grow dazzling designer flakes of all shapes and sizes.
No two snowflakes are precisely alike, and Libbrecht is trying to figure out why. In order to do so, he watches the ice crystals condense from water vapour onto a sapphire substrate, all the while taking high-res images with a digital camera hooked up to a microscope. By growing snowflakes for years on end, Libbrecht has amassed a brilliant photographic collection, not to mention the distinct honour of being the world's first designer snowflake artist.
Here are a few highlights.
Images courtesy of Ken Libbrecht. You can check out more of his work on his website, SnowCrystals.com.