At 80, palaeontologist Mary Dawson maintains a piercing interest in the origins of early life on Earth
In 2007, she'd accompanied these younger palaeontologists to Haughton crater, created 39 million years ago by a meteorite and named in honour of Samuel Haughton, a late 19th-century professor of geology at Trinity College in Dublin. At one time a lake, the crater is not only considered a trove of fossils, it's used as a stand-in for scientists researching life on Mars. Read more