Take a look around you, and in your mind's eye, randomly wipe out
all but a small fraction of what you can see. Pretend the vast rest of reality
is there but invisible.
You'd probably like a
device that helps you see much more of it.
Scientists working at
CERN, the European Organization for Nuclear Research, have made some progress
in that direction with the Alpha Magnetic Spectrometer (AMS), which has been
riding aboard the International Space Station since 2011.
Physicists believe that mental exercise in blindness reflects
the reality of our universe, only about 4% of which manifests as the kind of
matter and energy we can perceive.
More than 70% consists
of so-called dark energy, physicists say, and more than 20% is dark matter,
neither of which humans can directly detect so far.
But scientists feel
certain it must exist, partly because of the gravity it exerts on the visible
universe.
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