In Science
- The atomic mass of silicon.
- The atomic number of nickel.
- The fourth magic number in physics.
- The curing time of concrete is classically considered 28 days.
- The average human menstrual cycle is 28 days although no link has been established with the nightlighting and the Moon.
Read more about this topic: 28 (number)
Famous quotes containing the word science:
“Every known fact in natural science was divined by the presentiment of somebody, before it was actually verified.”
—Ralph Waldo Emerson (1803–1882)
“Democracy is the art and science of running the circus from the monkey-cage.”
—H.L. (Henry Lewis)