Albert Einstein’s theory of general relativity describes how gravity affects the structure of space-time.
The 1915 publication of the theory by Einstein built upon his prior 1905 theory of special relativity. Although it claimed that space and time are inexorably linked, special relativity did not take gravity into account.
According to NASA, Einstein spent the ten years between the two publications figuring out that extremely huge objects bend space-time, which results in gravity (opens in new tab).
[…] since it maintains our feet on the earth. Additionally, gravity is mathematically described in Einstein’s theory of general relativity as a “warping” of space. But compared to the other three forces known to science, […]