Dysprosium (dis-proh-zee-əm)
is a chemical element with the symbol Dy and an atomic
number of 66. The atomic weight is 162.500. 
Things you might not know about
Dysprosium:
- Because dysprosium and its compounds are
highly susceptible to magnetization, they are employed in various
data storage applications, such as in hard disks.
- Dysprosium is used in dosimeters for
measuring ionizing radiation.
- Dysprosium fires cannot be put out by water.
It can react with water to produce flammable hydrogen gas.
See GC2XAY2 - Hydrogen, for an explanation
about this series of caches.
Svefg gerr oruvaq gur ovt bar.