An interesting collection of landmarks in Science through the last 12 months can be found in the link below. They range from Physics, including two new discoveries in work related to my own field (the so-called "tetraquark" is particularly significant if confirmed), to chemistry to medicine. Hopefully something there for everyone. All cited, so you can read the stories behind them.
Enjoy...
http://imgur.com/gallery/utGvDTo
(Disclaimer: the discovery of gravitational waves, while announced in March, is still undergoing peer review and may be disputed; similar caveats could apply to a few other announcements).