Nature: Rodolfo del Valle and his team are heading to the Southern Ocean to measure a methane leak. For three years, Rodolfo del Valle and his team will be probing the ice and seabed in the Erebus and Terror Gulf. Persistent bubbling is stirring the water’s surface in the Erebus and Terror Gulf, a remote spot off the Antarctic Peninsula. When he saw the commotion in 2000, Argentinian geologist Rodolfo del Valle was intrigued — despite 38 years’ experience in the region. There was a …