1. Dark Matter
For the case where the universe is exactly equal to one, the Universe is delicately balanced between the two states, and is said to be "flat". ... The particles include photinos, neutrinos, gravitinos, axions, and magnetic monopoles, among many others. Of these, researchers have detected only neutrinos -- and whether neutrinos have any mass remains unknown. ... Another explanation for the missing mass is WIMPs, which stands for Weakly Interacting Massive Particles. ... Soon they will try an even more exotic search by moving their equipment to an old iron mine 2,400 feet deep in northern Min...
- Word Count: 798
- Approx Pages: 3
- Has Bibliography
- Grade Level: Undergraduate