Some 350 light-years away, the V1298 Tau system features an infant sun-like star, just 23 million years old, orbited by four ...

Rattled by U.S. President Donald Trump’s threats over Greenland, the European Union is readying countermeasures against the ...

President Trump is dismantling the global system the U.S. built in the 20th century. Foreign policy experts say he wants a ...