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How do polymer crystals work and why do they absorb so much water?
science.howstuffworks.com/dictionary/geology-terms/question581.htm
Polymer crystals are amazing in that they can absorb many times their size. In fact, one pound of these crystal flakes can hold up to 50 gallons of water. Find out what these polymer crystals are and why they are able to absorb so much water.
How do rescue teams search a flooded city?
science.howstuffworks.com/nature/climate-weather/storms/rescue-teams-search-flooded-city.htm
When a hurricane or flash flood strikes a city, it can leave residents stranded in their cars, homes or other buildings waiting for rescue. How do rescue teams know where to go first?
How do scientists determine if a nuclear blast has occurred?
science.howstuffworks.com/nuclear-detection.htm
In the first reports released since North Korea announced its underground nuclear test on Monday, officials are saying they have found no evidence of a nuclear signature in the air above the blast site.
How do scientists know what's inside dinosaur eggs?
science.howstuffworks.com/environmental/earth/geology/inside-dinosaur-egg.htm
How do scientists know what's inside dinosaur eggs? Learn about the techniques used by scientists to examine the fossilized remains of dinosaur embryos.
How do the engines breathe in diesel submarines?
science.howstuffworks.com/transport/engines-equipment/question286.htm
How do the engines breathe in diesel submarines? Don't internal combustion engines need a lot of oxygen to run? Where would all of this oxygen come from when the sub is underwater?
How do the streetlights turn on automatically at night?
science.howstuffworks.com/environmental/energy/question363.htm
On the Flintstones, a small bird sits inside the light and turns it on every night before he goes to bed. In a modern streetlight, a small circuit replaces the bird.
How do they deice airplanes?
science.howstuffworks.com/deice-airplanes.htm
If you're traveling during the winter time, there's a good chance that your flight may be delayed because the plane needs deicing. Why do they wait until the last minute to do this?
How do they get the balls in ball bearings so perfectly round and smooth?
science.howstuffworks.com/transport/engines-equipment/question513.htm
Ball bearings can be found in a wide variety of machines and gadgets. If you take a look at one of them you may notice how perfectly smooth they feel and appear. How do they get like that? Find out how ball bearings are created in this article.
How do they measure sea level?
science.howstuffworks.com/environmental/earth/oceanography/question356.htm
How do they measure "sea level"? Is it the average of the tides? And is the sea level actually rising or not?
How do they start jet engines on airplanes?
science.howstuffworks.com/transport/flight/modern/question411.htm
How do you start a gas turbine engine? What is the mechanism to begin the rotation of the large fan blades?