Such doubt does little to stop the tide of tourists coming to places such as Roswell, N.M., the site of a purported UFO crash more than 60 years ago.

• 这种怀疑并未能阻止游客前往新墨西哥洲罗斯韦尔的脚步,据说60多年前那里有不明飞行物坠毁。