12 April, 2008Ice in the Desert: A Fridge without Electricity 2 min read rarheaume science africa, development, invention, physics 0 CommentsReading Time: 2 minutes New idea used very old technology science africa development invention physics
18 February, 2008Fact Snack: Invention < 1 min read rarheaume web factoid, invention 0 CommentsReading Time: < 1 minute Six Principals for Making Things web factoid invention