Astroparticle Physics: On the Cusp of Discovery
Dark matter is one of the most important and enduring enigmas of modern science. Since the 1930s, its been known that there must be about five times as much of this mysterious substance in the Universe than there is normal matter, and yet, it has never been seen. Why do we think it exists? What might it be? How might we finally be able to detect it? And how might its discovery rewrite the textbooks of physics? The answers may come from a remarkable new experiment taking shape deep under the hills of South Dakota.