Milestones > > A look at just a few of the important discoveries we have made in the past 135 years: Determined that massive, mature, fully formed galaxies existed more than 8 billion years ago, far earlier than expected, necessitating a re-examination of the dominant theory of galactic evolution (2004) Sent a spacecraft to Mercury to orbit the planet and see, for the first time, the majority of Mercury’s surface (2004) Landed the first spacecraft on an asteroid (2001) Isolated and cultivated human embryonic stem cells, the undifferentiated cell from which an entire human being eventually develops (1998) Helped develop the first effective treatment for sickle cell anemia (1995) Discovered that pennies’ worth of vitamin A supplements administered to Indonesian children as part of a blindnes
来源(Source From): https://www.jhu.edu/research/milestones/