For decades, scientists have searched for a fifth fundamental force of nature that can explain mysterious aspects of the ...

Sulfur is one of the most abundant elements in the universe. If you peer into a diffuse interstellar cloud, you find loads of it—about the amount expected based on fusion patterns in the stars it was ...

The hunt for Planet Nine continues as new discoveries make the Solar System’s biggest mystery even harder to solve. Is there ...

What if some black holes aren’t black holes at all? A new theoretical study suggests that when a massive star collapses, it ...