2009-03-25 polar bear #Photo Two polar bears spar in the snow as a magenta sunset descends over Churchill, Canada. Scientists fear that the shifting Arctic climate could threaten the species' survival. spar スパーリングをする magenta 赤紫色の descend 傾斜する fear 心配する reference http://photography.nationalgeographic.com/photography/photos/life-color-purple/purple-play-nicklen.html