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President Trump signed an order Thursday aimed at making it easier for companies to mine the ocean floor. Scientists and environmental groups say it could harm a fragile ecosystem.

Last year, more than 9 million people watched across the world, and executive producer Johan Erhag said he expects viewership will be even higher this year.

Some scientists are convinced that beyond Neptune, there's a planet they've yet to see. This so-called "Planet 9" is so far away, it would be a faint object. The stretch of sky researchers would have to search is huge. But a new astronomical facility ...

Have you seen ADHD content pop up in your feeds? Are you getting a lot of it? In the past few years, there's been a surge in the number of adults diagnosed with ADHD, and at the same time more and more people online are going viral with "signs" that ...