Scientists suggest that a fifth, hidden force linked to dark energy may exist in the solar system but has not yet been ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago. But ...

For decades, the four known forces of nature, gravity, electromagnetism, and the strong and weak nuclear forces, have ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

Scientists have seemingly settled long-standing arguments about whether the components of Earth originated from the inner or ...

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