英國物理學家「霍金」預測，科技不斷發展，總有一天會把人類居住的地球給毀了。
「霍金」是劍橋大學「應用數學及理論物理」教授，也是天文學家。他說，人類現在有核子武器、地球暖化和基因改造病毒可以毀掉地球。今後新發明會越來越多，也越來越容易毀掉我們居住的地球。
他預測，要是幾千到一萬年之內，人類不能移居去別的星球，大概就會在宇宙間消失了。
(圖片取自網路)
原文影片請看此
藍源（Blue Origin）太空公司創辦人貝佐斯（Jeff Bezos）週一宣布，該公司成功完成歷史性任務，發射及降落「可回收火箭」。
「新謝帕德號」（New Shepard）由火箭推進器及乘客艙兩部分組成，以單一的BE-3液氫液氧引擎提供動力。
在德州范霍恩市（Van Horn）的發射中，BE-3引擎提供了11萬磅的推進力。
一旦到達太空中，乘客艙便與火箭推進器分離，乘客艙將在太空中漂浮數分鐘，最後利用降落傘重新進入大氣層。
火箭推進器也會導航降落。降落前，火箭會重新啟動BE-3引擎，以7公里時速垂直降落地表，離原本發射台僅距1.3公尺。
與競爭對手太空探索公司（SpaceX）相較，2013年SpaceX火箭可飛進太空數百米，而藍源火箭，可飛至距離地表一百公里高處。
這艘火箭推進器及乘客艙皆可回收使用，最終可載運乘客，遊覽太空數分鐘之久。
然而，目前這艘火箭的推進力，尚不足以將太空船送上循環軌道。
為此， SpaceX公司正在研發一種更強力的可回收火箭，預計2015年12月後發射。
英文原文：
Jeff Bezos’ Blue Origin space travel company conducted a historic test on Monday, successfully launching and landing a reusable rocket.
The New Shepard space vehicle is made of a crew capsule and a rocket booster powered by a single BE-3 liquid hydrogen, liquid oxygen engine.
The rocket’s BE-3 engine delivered 110,000 pounds of thrust for its launch from Van Horn in Texas.
Once in space, the crew capsule separated from the booster, floating for several minutes before deploying parachutes and re-entering into atmosphere.
The booster also descended under guided flight. Before landing, it re-ignited the BE-3 engine, which allowed a vertical landing at 7km/h just 1.3 metres from the center of its launch pad.
While the SpaceX reusable rocket was able to fly into space a few hundred meters in 2013, the Blue Origin rocket could fly up to 100 kilometres above Earth.
This means that the rocket and its capsule could be reused and eventually employed to allow paying passengers to take trips into space for a few minutes at a time.
The rockets, however, are not yet powerful enough to bring a spacecraft into orbit.
For that purpose, SpaceX is designing a larger and more powerful reusable rocket that could be launched after December 2015.
