Thanks. I always thought it was strange the way maple seeds fluttered down before I split them in half and stuck them on my nose! How raindrops fall Exploding drops produce miniature showers. Fiona Tomkinson <a href="http://www.nature.com/news/2009/090720/full/news.2009.705.html" rel="nofollow" target="_blank">http://www.nature.com/news/2009/090720/full/news.2009.705.html</a>