Trying to work out what dark energy really is (or if it even exists) requires accurate measurements, particularly of the rate at which the universe is expanding.
Jodi Cooley works half a mile underground, in a mine that stopped operating 40 years ago. A rattling elevator takes her to work, 27 floors beneath the surface. The ride down the mineshaft is five minutes of complete darkness. A colony of bats inhabits the mine.
Advances in virtual control technology have shown scientists just how important humans are after all. Although scientists can now essentially operate a particle collider from anywhere in the world, having members of a team work well remotely is just as significant a challenge.
If this magnet could talk, you'd hear some amazing stories. During its half-century career, this four-million-pound magnet contributed to experiments that changed our view of physics while serving some of the field's foremost experimenters, including Enrico Fermi.
Three-year-old Madeleine Rogers stands inside the spooky remains of a 275-pound pumpkin grown by her father, Stanford Linear Accelerator Center engineer Reggie Rogers.
For artist Lylie Fisher, particle physics is much more than a field of science. It is art: "Like art, particle physics deals with the invisible," says Fisher. "One portrays emotional and spiritual experiences; the other studies unseen matter and energy.
Fermilab might not have the world's longest fingernails or the world's oldest man, but, according to Guinness World Records 2007, the lab does have the most powerful beam of neutrinos.
Like many particle physicists, JoAnne Hewett can trace the course of her career through her scientific publications. But for a more colorful retrospective of her work, the SLAC theorist simply decorates her Christmas tree.
The big-bang theory of the early universe implies that the universe is immersed in a bath of microwave light, a cooled-down remnant of early high-temperature radiation, invisible to the naked eye.