When North Korea detonates nuclear bombs, it brings the devices into tunnels dug deep inside Mount Mantap, a granite peak over 7,000 feet tall. Mantap has now sustained six such detonations, with the last of which — set off on September 3, 2017 — moving the mountain more than 11 feet (3.5 meters), according to researchers who used space imaging technology, called synthetic aperture radar, or SAR, to map how much Mantap's surface shifted and then settled back down during the blast. They published their results in the journal Science on Thursday. Although this technique isn't yet used to rapidly detect attempts at secretive nuclear testing today, it could help do so in the future. SEE ALSO: Extreme Arctic heat wave in 2016 wouldn't have happened without climate change "World peace benefits from the adherence to internationally-negotiated nuclear-test-ban treaties that strive to promote the non-proliferation of nuclear weapons," Teng Wang, lead author of the study ...