If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

An exoplanet discovered in 2020 contains the coldest temperatures ever measured on a planetary body, according to scientists.

Championing sustainability by promoting nature nonprofits, increasing recyclability and reducing waste and emissions.

By combining data on all known bird species, this tree is the most impressive snapshot yet of one of Earth’s most ...

The environmental charity behind a number of high-profile recycling schemes went into voluntary administration this week.

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This "think tank" blueprint would take us back to the 1700s, when Blacks, Native Americans and women weren't considered equal ...

Consider the evidence and potential effects of a hypothetical ninth planet lurking in the outer solar system. Trump is tired of waiting for Boeing to make him a new Air Force One so the government is ...

Nicholson is a double Emmy contender this season for Hulu's postapocalyptic drama 'Paradise' and Max's backstage comedy ...

By sifting through that vast dataset, the team found 2,889 likely superflares on 2,527 sunlike stars. That works out to ...