Six-sided snowflakes bloom in slow motion

Full story here: http://www.newscientist.com/article/dn25130
Watch in mesmerising detail as snowflakes appear to crystallise into unique beauties -- then discover the clever trick behind the high-speed video

Correction: When this article was first published on 27 February 2014, it described the snowflakes as growing, rather than subliming in reverse motion.