Dr Ken Libbrecht is the world expert on snowflakes, designer of custom snowflakes, snowflake consultant for the movie Frozen - his photos appear on postage stamps all over the world physics Video 18:49 6 votes
Our first interstellar visitor, 'Oumuamua, is still a mystery. Despite some speculation, it's not a spaceship... but it might be a three-dimensional fractal snowflake. astronomy Article 1347 words 9 votes