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:
“I exulted like “a pagan suckled in a creed” that had never been worn at all, but was brand-new, and adequate to the occasion. I let science slide, and rejoiced in that light as if it had been a fellow creature. I saw that it was excellent, and was very glad to know that it was so cheap. A scientific explanation, as it is called, would have been altogether out of place there. That is for pale daylight.”
—Henry David Thoreau (1817–1862)
“What an admirable training is science for the more active warfare of life! Indeed, the unchallenged bravery which these studies imply, is far more impressive than the trumpeted valor of the warrior.”
—Henry David Thoreau (1817–1862)