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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 35 subcategories, out of 35 total.
►Units of time (11 C, 97 P)
►Economics and time (2 C, 17 P)
►Time in fiction (6 C, 19 P)
►Time in government (11 C, 17 P)
►Horology (7 C, 60 P)
Pages in category "Time"
The following 52 pages are in this category, out of 52 total. This list may not reflect recent changes (learn more).