The idea of growing teeth in a lab has vague horror movie connotations, but it could serve a real, practical, non-scary purpose - in replacing cavities and damaged teeth - and new research gets us another step closer to being able to do it.
The head of Iran's rescue organisation confirmed that four people have died and 516 people sustained injuries after the explosion at Rajaei port on Saturday.
A New Yorker profile suggested Alex Soros "embarrasses" his father's foundation with his quest to "collect shiny objects" and post pictures with top Democrats.