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How are astronomers able to measure how far away a star is?
science.howstuffworks.com/question224.htm
It turns out that measuring the distance to a star is an interesting problem! Astronomers have come up with two different techniques to estimate how far away any given star is.
How are bendy straws made?
science.howstuffworks.com/innovation/everyday-innovations/how-bendy-straws-are-made.htm
It bends to your will, it has nifty ridges, and it allows patients and little kids alike to slurp along with everyone else. How did the flexible straw begin its days?
How are conventional and unconventional warfare different?
science.howstuffworks.com/conventional-unconventional-warfare.htm
The U.S. Navy SEALs exemplify unconventional warfare. Find out how conventional and unconventional warfare differ in this article.
How are crystals made?
science.howstuffworks.com/environmental/earth/geology/how-are-crystals-made.htm
From the Hope diamond to the shiny bits in instant coffee, crystals have always held the power to fascinate us humans. Are they more than just a bunch of pretty facets?
How are fossil replicas made?
science.howstuffworks.com/environmental/earth/geology/fossil-replica.htm
Fossil replicas give scientists the chance to learn about dinosaur fossils and to display replicas for the public to see. Learn more about fossil replicas.
How are frequency and wavelength of light related?
science.howstuffworks.com/dictionary/physics-terms/frequency-wavelength-light.htm
Frequency has to do with wave speed and wavelength is a measurement of a wave's span. Learn how frequency and wavelength of light are related in this article.
How are genes turned off and on?
science.howstuffworks.com/life/genetic/genes-turned-off-on.htm
How are genes turned off and on throughout our life? Find out how genes are turned off and on in this article from HowStuffWorks.
How are the Voyager spacecraft able to transmit radio messages so far?
science.howstuffworks.com/question431.htm
The Voyager spacecraft use 23-watt radios. This is higher than the 3 watts a typical cell phone uses, but in the grand scheme of things it is still a low-power transmitter. The key to receiving the signals is therefore not the power of the radio, but a combination of three other things.
How are viruses, viroids and prions related?
science.howstuffworks.com/life/cellular-microscopic/viruses-viroids-and-prions-related.htm
Viruses, viroids and prions are microscopic, infectious particles with a common, despicable goal - but the way each goes about achieving that goal is different.
How are voltage surges and spikes different?
science.howstuffworks.com/voltage-surges-spikes-different.htm
What happens when there's too much voltage? Learn about the difference between voltage surges and spikes from this article.