未来潜艇探索地球最后的未知领域

配备性能更加优良的电池和材料，新型潜艇试图驶入从未涉足的深海，在人类的眼前打开整个未被开发过的海洋世界。据乐观估计，我们现已探明的仅约占整个海洋世界的5％，绝大部分仅到达距海平面1000英尺处，也就是我们熟知的由于阳光穿透入海形成的蓝色水域，那里有着各种多彩暗礁和几乎你知道的所有鱼类。再

Tomorrow＇s Subs Open Earth＇s Final Frontier

Armed with better batteries and stronger materials, new submersibles aim to go deeper than ever before and open up the whole of the unexplored ocean to human eyes. By liberal estimates, we＇ve explored about 5 percent of the seas, and nearly all of that in the first 1,000 feet. That＇s the familiar blue part, penetrated by sunlight, home to the colorful reefs and just about every fish you＇ve ever seen. Beyond that is the deep-a pitch-black^1 region that stretches down to roughly 35,800 feet, the bottom of the Marianas Trench. Nearly all the major oceanographic finds made in that region—hydrothermal vents and the rare life-forms that thrive in the extreme temperatures there, sponges that can treat tumors, thousands of new species, the Titanic—have occurred above 15,000 feet, the lower limit of the world＇s handful of manned submersibles for most of the past 50 years.