The dream of flight began with early humans, who watched birds dart back and forth and soar high above. This dream extended to spaceflight, as humans realized that there is more above than just our sky, that the stars are like our sun and that there are planets orbiting those stars.
원문출처 : http://www.cnn.com/2016/09/02/opinions/space-x-explosion-chiao/index.html
원문출처 : http://www.cnn.com/2016/09/02/opinions/space-x-explosion-chiao/index.html