A Russian intercontinental ballistic missile (ICBM) fired from an underground silo on the country’s southern steppe Friday on a scheduled test to deliver a dummy warhead to a remote impact zone nearly ...

Astronomers have been tracking Betelgeuse’s instability for years, but new modeling now shows what the star’s collapse would truly unleash. The implosion would trigger an explosion brighter than a ...

President Donald Trump said Tuesday his plan to end the war in Ukraine was "fine-tuned" and he's sending his representatives to meet Russian and Ukrainian officials.