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 5 years 7 months 2 weeks ago • 10,061 views
Top Videos of 2009
Created: 1 decade 5 years 1 month ago
Updated: 1 decade 5 years 1 month ago
Views: 12,850
Updated: 1 decade 5 years 1 month ago
Views: 12,850
These are the 100 videos that were submitted and received the most votes during the year of 2009.
Displaying 1 of the 100 videos in this playlist:
1 decade 5 years 7 months 2 weeks ago • 10,061 views