Aerogel is the least dense substance ever created, and is used in NASA space suits, and to make the world's lightest ping-pong ball...
posted by arvana 1 decade 4 years 10 months 4 weeks ago • 10,057 viewsTop Videos of 2009
Created: 1 decade 4 years 4 months 2 weeks ago
Updated: 1 decade 4 years 4 months 2 weeks ago
Views: 11,730
Updated: 1 decade 4 years 4 months 2 weeks ago
Views: 11,730
These are the 100 videos that were submitted and received the most votes during the year of 2009.