Scientists estimate that many hundreds of billions of
neutrinos will have harmlessly sped through your body by the
time you finish reading this sentence. But despite their
abundance, there's only a 10 percent chance over the course of
your entire lifetime that even one of these invisible
particles will ever (again, harmlessly) interact with any
other particle in your body. Because of the rarity of
collisions between neutrinos and matter—events that are
necessary to perceive or study these spectral
particles—neutrinos play an expert game of hard-to-get
with physicists, who have designed giant, extremely sensitive
detectors to seek them out. In this slide show, take a tour of
some of the most intriguing neutrino experiments around the
globe, and find out what tantalizing results keep the experts
on the trail of the ghost particle. To launch the
slide show, click on the image at left.—Lexi Krock
