A 34-year-old British astrophysicist visiting the Greek island of Ikaria vanished during a morning run — and authorities believe a body found in a ravine Wednesday is hers, according to new reports. Dr. Natalie Christopher, who was from London but was living in Cyprus, was on vacation with her 38-year-old partner, who reported her missing when she didn’t answer her phone Monday, Metro UK reported. Authorities on the island, about 130 miles southeast of Athens, discovered a body in a ravine as they swept the region for any signs of Christopher, the outlet reported. The body has yet to be...