1. The West Antarctic ice sheet enters irreversible decline.
2. Dogs recognize their master's voice.
3. Discovery of gravitational waves.
4. Antibiotic resistance wins the Longitude prize
5. Launch of the Orbiting Carbon Observatory
6. The octopus who sat on her eggs for four years
7. Nobel Prize for the discovery of a navigational system in the part of the brain known as the hippocampus.
8. Virgin Galactic crash
9. Monica Grady's reaction to the Philae landing
10. Discovery of engravings 350,000 years older than previously known.
11. The Orion test flight returns to Earth
12. Solar panels approach 40% efficiency.
http://www.theguardian.com/science/2014/dec/21/12-most-important-moments-in-science-2014
2. Dogs recognize their master's voice.
3. Discovery of gravitational waves.
4. Antibiotic resistance wins the Longitude prize
5. Launch of the Orbiting Carbon Observatory
6. The octopus who sat on her eggs for four years
7. Nobel Prize for the discovery of a navigational system in the part of the brain known as the hippocampus.
8. Virgin Galactic crash
9. Monica Grady's reaction to the Philae landing
10. Discovery of engravings 350,000 years older than previously known.
11. The Orion test flight returns to Earth
12. Solar panels approach 40% efficiency.

http://www.theguardian.com/science/2014/dec/21/12-most-important-moments-in-science-2014