Ask HN: What are the greatest discoveries in the last few years?
I would say, in no particular order:    * the fact that many of the dinosaurs had feathers
    * myriad of exoplanets
    * water on Mars (and many other new data on the planet)
    * Higg's boson (confirmed to 99.999% certainty)
    * Neanderthal genes present in modern humans
    * new ancient Mayan cities

That's it from me for starters, hopefully others will join in.