What are the greatest scientific discoveries/accomplishments within the last 20 years that have propelled humanity (and our understanding of it) forward?
If necessary, can extend this to the past 50 years as well.
Ask HN: What are the greatest scientific discoveries within the last 20 years?
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Re: Ask HN: What are the greatest scientific discoveries within the last 20 years?
#2A bit older but seem relevant "Ask HN: What are the greatest discoveries in the last few years?" https://news.ycombinator.com/item?id=9731111