We’re closer than ever before to knowing whether there is a ninth planet whooshing around the sun – and, alas, it’s not Pluto. Planet X, also called Planet Nine, is a hypothetical planetary body seven ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague? If ...

The Smithsonian partners with NASA to present the Earth Information Center, a larger-than-life display that visualizes interconnected changes on the planet Jack Tamisiea The museum's newest exhibition ...

The immersive experience includes real-world footage and animations, brought to life by 24 projectors and five interconnected screens. Trustees of the Natural History Museum Fans of David Attenborough ...