How to Build an Upside-Down Fire: The Only Fireplace Method You’ll Ever Need
http://www.fourhourworkweek.com/blog/2009/02/02/how-to-build-an-upside-down-fire/

good site

Evidently, houseflies, being highly edible and defenseless, are nervous types, and don't like to sit still when they see something moving nearby, because it could be a predator. The water bag acts a bit like a lens—try it some time—in which the movements of people in the area are reflected. Even if the fly is too far from the action to see it directly, it can see a shifting of light and dark in the water bag, which it interprets as nearby movement, and it will fly away from the bag.

scientific road trip with kids, amazing, time dilation, Project GRE²AT: Photo Tour http://bit.ly/Iv2Bd [from http://twitter.com/meika/statuses/2158854078]

"Does gravity really alter time and can this weird phenomenon be detected with a family road trip experiment?" -- via Jed Parsons

"we were able to detect and measure the effects of relativistic time dilation compared to atomic clocks we left at home." [via kenglass]

n September 2005 (for the 50th anniversary of the atomic clock and 100th anniversary of the theory of relativity) we took several cesium clocks on a road trip to Mt Rainier; a family science experiment unlike anything you've seen before. By keeping the clocks at altitude for a weekend we were able to detect and measure the effects of relativistic time dilation compared to atomic clocks we left at home. The amazing thing is that the experiment worked! The predicted and measured effect was just over 20 nanoseconds.

Experimentally proving relativity by taking atomic clocks up higher in elevation (to increase speed due to Earth's spin being different). A family vacation with three kids.

freeze dried fruit,dried vegetables,dehydrated vegetables,tvp

Purveyor of dehydrated fruits and vegetables.

I suck at tying knots.