3. In 2010, the Martin Aircraft Company introduced a jetpack it called "the world's first piratical jetpack." The jetpack even won a spot in Time's Top 50 Inventions of 2010. While its development has been on since 1981, the world's first jetpack is known to have flown in 1958. It was designed by Wendell Moore, a researcher at Bells Aerosystems. Early prototypes of Wendell's jetpack could reach a height of 5 meters (16 ft) and remain airborne for three minutes. This attracted the attention of the US Army, which funded the project with $150,000. Several test flights were later done for the US Army and even for JFK himself. The army later stopped paying for more research into the project because the flight time and distance were not convincing enough. NASA also wanted to use the jetpack for their Apollo 11 mission to serve as backups in case their lunar module malfunctioned. They later changed their minds, going for the lunar rover instead. After this setback, Bell discontinued further research on the jetpack.
4. 3所在这份榜单上叱咤多年的重量级学府——哈佛商学院(HBS)、伦敦商学院(LBS)和麻省理工斯隆管理学院(MIT Sloan School of Management)的排名下滑。哈佛商学院的排名下降两个位次，今年排在第四，这是这所位于波士顿的学府9年来首次跌出前三甲。伦敦商学院下滑3个位次，排在第六，为14年来最低。麻省理工斯隆管理学院的排名下滑至第13位，为10年来首次跌出前10。
5. Rank: 3
6. Apple Inc. CEO Steve Jobs introduces the iPad 2 on stage during an Apple event in San Francisco, California in this March 2, 2011,