Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return mission. The focus of this video is silica aerogels, though graphene aerogels are now technically the lightest.
Posted 3 weeks ago by boyt in category: interesting   Comments (0)


Office chair racing
Posted 1 week ago by adam2 in category: wtf   Comments (1)


Jimmy Smith
Posted 5 days ago by Bastian in category: sports   Comments (0)



The 4 kilometre crossing between Helsingborg in Sweden and Helsingør in Denmark doesn't seem that far, but this ferry is crossing up to 46 times a day, and charging for a few minutes each side. The route handles more than 7 million passengers and almost 2 million vehicles each year with crossings every 15 minutes.
Posted 2 months ago by dabears in category: technology   Comments (0)