After a decade-long search, researchers have identified East Asia’s tallest known tree, the “Heaven Sword of the Da’an River,” in Taiwan. Determined researchers have found East Asia’s tallest known tree in a secluded valley near one of Taiwan’s longest rivers. The team named the massive fir tree “Heaven Sword of the Da’an River” — a nod to the legendary weapon from Jin Yong’s martial a... [8353 chars]