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Title: Frozen smoke Written by: duddy on Jun 3, 2014 (https://biology-forums.com/gallery/47/4_03_06_14_10_07_01.jpeg) (https://biology-forums.com/index.php?action=gallery;sa=view;id=16282) Aerogel or "frozen smoke" is the world's lowest density solid. This hologram-like substance is 99% air. It is almost impossible to feel if you hold it in your hand but when you poke it, it feels like Styrofoam. Comments: True, it's hard to keep track. Thanks for letting me know. I'll do a search next time I post something new. Written by: duddy on Jun 6, 2014 I believe an article like this one was posted a while ago, duddy... http://biology-forums.com/index.php?article=113 Written by: bio_man on Jun 3, 2014 |