Einstein’s general theory of relativity—the idea that gravity is matter warping spacetime—has withstood over 100 years of scrutiny and testing, including the newest test involving supermassive black ...

Physicists have proven a 100-year-old prediction of relativity by showing that Einstein's equivalence principle holds at quantum scales.

Physicists have long struggled with their goal of making gravity a quantum force. A radical post-quantum approach might solve ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. An international team of astronomers has conducted a new test of Albert ...

Millisecond pulsar, left foreground, is orbited by a hot white dwarf star, center, both of which are orbited by another, more-distant and cooler white dwarf, top right/NRAO/AUI/NSF In studying the ...

Einstein revolutionised our understanding of gravity in 1915. With gravity wave experiments and a new view of quantum theory, 2015 promises more ONE of the defining anniversaries in 2015 will be the ...

A preliminary analysis of data from the Gravity Probe B satellite has confirmed that the Earth's mass distorts the fabric of space and time as predicted by Einstein's theory of general relativity.

This image of Europe’s Columbus space laboratory was taken by ESA astronaut Luca Parmitano during his spacewalk on July 9, 2013. Image via ESA/NASA. The International Space Station will host the most ...