What Is Time? A History of Physics, Biology, Clocks and Culture.
By DAN FALK; Illustrations by ELEANOR LUTZ and OLENA SHMAHALO
The human mind has long grappled with the elusive nature of time: what it is, how to record it, how it regulates life, and whether it exists as a fundamental building block of the universe. This timeline traces our evolving understanding of time through a history of observations.