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What is optical audio?
electronics.howstuffworks.com/gadgets/audio-music/optical-audio.htm
Optical audio offers a new way to send audio and video from your gear to your ear. Learn how optical audio works.
How Shallow Diving Works
entertainment.howstuffworks.com/arts/circus-arts/shallow-diving.htm
Shallow diving essentially involves extreme belly flopping. Learn how shallow diving works.
How the Hyperloop Works
science.howstuffworks.com/transport/engines-equipment/hyperloop.htm
Ready for a fifth mode of transportation? Elon Musk is. He's sketched out a proposal for a nearly supersonic transportation system that could shoot you from San Francisco to Los Angeles faster than you can watch an episode of "Game of Thrones."
How Google Loon Works
computer.howstuffworks.com/google-loon.htm
Google's Project Loon is intended to make Internet access available everywhere. Learn more about Project Loon at HowStuffWorks.
How Projection Television Works
electronics.howstuffworks.com/projection-tv.htm
Projection television can provide an HD picture at a range of sizes and prices. Learn about front and rear projections TVs and read HDTV reviews.
How Prenatal Testing Works
health.howstuffworks.com/pregnancy-and-parenting/pregnancy/issues/prenatal-testing.htm
During a pregnancy, different kinds of prenatal testing are an important part of the process. See how prenatal testing protects both the mother and child.
How Rocket Engines Work
science.howstuffworks.com/rocket.htm
Rocket engines harness the energy to get a spaceship off the ground. Learn about solid-fuel rocket engines, liquid-propellant rockets and the future of rocket engines.
How Nuclear Fusion Reactors Work
science.howstuffworks.com/fusion-reactor.htm
Fusion reactors will use abundant sources of fuel, will not leak radiation above normal background levels, and will produce less radioactive waste than current fission reactors. Learn about this promising power source.
Can vitamins lower cholesterol?
The link between vitamins and cholesterol is complex. Learn how antioxidents in vitamins and minerals fight free radicals to keep your heart healthy.
Why does smoke come from a fire?
science.howstuffworks.com/environmental/energy/question43.htm
Let's say you have a nice fire going, and it's reduced down to a pit of hot "glowing embers." If you now toss a piece of wood, or even a sheet of paper, onto this fire, you see a huge puff of smoke as it heats up.