If there had been no day and night concept, how would we measure time?

01 January 1970 1 9K Report

I found an example.

Through ageing of living bodies

Could you figure out more examples?

Aging of living bodies would merely show passage of time, but there would be too much variation in the ongoing effects of aging to yield a suitable measure. A process of change that is regular is needed, like e.g. the steady drip of water from a punctured gourd. Counting the number of successive drops would give a reasonable measure of time passed.

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