From unifying quantum physics and gravity to working out what is dark matter, the universe has some deep questions that ...

Here, Space.com explores some of the biggest space mysteries currently perplexing scientists. In the early 20th century, astronomer Edwin Hubble discovered that the universe is expanding ...

Researchers hypothesize a fifth force of nature that could explain the intricate relationship between dark matter and dark ...

Since 1998, we’ve known the Universe’s expansion is accelerating. Dark energy likely drives this, but its properties remain deeply mysterious.

On March 15, 2024, a space-based observatory detected bursts of low-energy X-rays from deep in the ancient universe, ...

By observing the sig... The Hubble Space Telescope has provided an unprecedented view of quasar 3C 273, one of the brightest objects in the universe, unveiling mysterious features near its core.

DC fans won’t want to miss this year’s Free Comic Book Day, as the event includes a comic teasing a major development in the ...

The beam will contain neutrinos — the most mysterious fundamental particles known in the universe. Leaving from France on Oct. 14, the 55-by-14-foot coldbox was shipped across the Atlantic Ocean ...

Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic mission may investigate the area one day.