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With
the human genome nearly mapped out, researchers
will soon be able to compare the map to specific
DNA samples to find what else is lurking there.
The key is a computer program that subtracts
the human DNA from a sample, making the DNA
from viruses and other unwanted guests stick
out like a sore thumb.
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Real birds change virtual evolution
How blue jays think about lunch directly affects
how certain moths look. Thanks to a mix of real
and artificial life forms, this long-standing theory
has gained some experimental verification.
Material
turns infrared to green
Most molecules can handle only one photon at a time.
A particular molecule that can absorb three photons
at once can also be used as a laser. When a bunch
of these molecules are hit with infrared light,
they absorb three infrared photons each and release
that energy all at once in the form of green light
-- a handy trick that may prove useful for communications,
data storage and medical imaging.
Nanotube
chips draw near
Growing carbon nanotubes where and how you want
them on a silicon wafer is a big step toward putting
the popular specks of soot to work.
Chip
material provides more bang
Mix the right amount of the right substance into
silicon and you get computer chips that explode
at the touch of a button. In addition to the obvious
Mission Impossible-type applications, these puny
powder kegs could lead to hand-held chemical analyzers.
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