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Time is a measure of duration. It can mark change by operational definition, or by other technologies. By the 20th century, Albert Einstein came to regard time as a fourth dimension, along with space, within a spacetime.
This category has the following 11 subcategories, out of 11 total.
- ► Events (9 C, 1 P, 1 F)
- ► Horology (7 C, 36 P)
- ► Rhythm and meter (6 C, 82 P, 3 F)
- ► Time scales (1 C, 23 P)
- ► Units of time (7 C, 77 P)
Pages in category "Time"
The following 29 pages are in this category, out of 29 total.
Media in category "Time"
This category contains only the following file.