According to police in the Valais region of Switzerland, the melting of glaciers has begun to expose the remains of people who went missing decades ago. Late last month, a hiker discovered human remains that turned up following the melting of the Trift glacier south of the city of Lucerne, prompting a recovery operation. DNA tests conducted at a Valais hospital determined that the remains were those of two Belgian mountaineers, aged 39 and 41 at the time, who went missing near the Weissmies mountain in 1992. Such discoveries are nothing new but have become more frequent as Switzerland's glaciers have melted at an increasing rate. Three years ago, DNA tests confirmed that a body found on a Swiss glacier near the Matterhorn was that of a German mountaineer who disappeared in 1986. Many scientists blame global warming for a recent surge in glacier melt in Switzerland and beyond.