Mojtaba Khamenei’s secretive rise as Iran’s new ayatollah and absence from public has fuelled speculation over his injuries, whereabouts and whether he really controls the IRGC. What is known so far?

Machine learning is the ability of a machine to improve its performance based on previous results. Machine learning methods enable computers to learn without being explicitly programmed and have ...

The prescription drug leucovorin is getting a label update, but it’s not what that the US Food and Drug Administration suggested during a White House briefing in September, when officials touted the ...

Depression can be temporary or long-term. You may find help with mediation or different therapies, such as cognitive behavior therapy. It’s important to seek professional help if you’re feeling major ...