Search results
Results From The WOW.Com Content Network
In Albert Einstein's general theory of relativity, gravity is treated as a phenomenon resulting from the curvature of spacetime.This curvature is caused by the presence of mass.
Silk use in fabric was first developed in ancient China. [ 13 ] [ 14 ] The earliest evidence for silk is the presence of the silk protein fibroin in soil samples from two tombs at the neolithic site Jiahu in Henan , which date back about 8,500 years.