Grok, Elon Musk's artificial intelligence (AI) chatbot, is now available as a standalone app for iPhone and iPad.

Jimmy Carter's grandson Jason recalls humorous moments with his grandparents that prove that, at heart, they were "regular ...

"BepiColombo's main mission phase may only start two years from now, but all six of its flybys of Mercury have given us invaluable new information about the little-explored planet." ...