Switzerland’s two powerhouse cities sit at opposite ends of the country — literally and figuratively. Zurich commands the ...

A mathematical investigation of galactic data suggests elusive dark matter is confined to the rules of gravity.

Does dark matter follow the same laws as ordinary matter? The mystery of this invisible and hypothetical component of our ...

From galaxy rotation curves that defy Newton's laws to gravitational lensing that bends light in eerie ways, scientists have ...