HowStuffWorks Science & Technology Newsletter May 28, 2007 howstuffworks(r)| science & technology

May 28, 2007
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http://science.howstuffworks.com/luminol.htm 
How Luminol Works

Luminol
is an incredible compound that crime scene investigators use to reveal traces
of blood at crime scenes. Learn how
http://science.howstuffworks.com/luminol.htm 
luminolworks, how investigators use it and
about the process known as chemiluminescence.

Also at HowStuffWorks
http://science.howstuffworks.com/plasma-cutter.htm 

http://science.howstuffworks.com/plasma-cutter.htm 
How
Plasma Cutters Work- It may
sound like something out of a sci-fi novel, but the plasma cutter is actually a
common tool that has been around since World War II. Using the power of plasma,
these machines cut through extremely hard metals. Find out how plasma cutters
work.

http://computer.howstuffworks.com/facial-recognition.htm 

http://computer.howstuffworks.com/facial-recognition.htm 
How
Facial Recognition Systems Work- You've
probably seen it in a dozen movies and television shows: sophisticated computer
programs identifying criminals by analyzing their facial structures. These
depictions aren't always accurate, but it's still remarkable technology. Find
out how facial recognition systems work and learn what a faceprint is.

http://www.howstuffworks.com/sunscreen.htm 

http://www.howstuffworks.com/sunscreen.htm 
How
Sunburns and Sun Tans Work- Treading
the fine line between a sunburn and a sun tan is a challenge for many
beachgoers. In this article, learn how the sun affects your skin and how much
sun exposure is too much.

This Week's Video
http://videos.howstuffworks.com/silly-string-video.htm 

http://videos.howstuffworks.com/silly-string-video.htm 
How
Silly String Works-Silly String is a fun and, yes, silly toy that has some interesting science behind it.
It's even been adapted by soldiers inIraqto check for trip wires. In
this
http://videos.howstuffworks.com/silly-string-video.htm 
videofrom HowStuffWorks, watch and learn how Silly String works.

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