Dark Matter: Scientists tested Newton’s Law across 750 million light-years: Does gravity still work as Newton predicted?
It’s been more than three centuries since Isaac Newton figured out that gravity pulls things together. You’d think, by now, we’d have caught some flaw. But scientists just put his law to a jaw-dropping new test, stretching it over cosmic distances Newton could never have dreamed of. And once again, Newton and Einstein, too, stand…