find, discovery, breakout, record-breaking, surpassing, momentous, triumphal, red-letter, accomplished, showstopping, more...

deadlock, stalemate, impasse

scientific, technological, medical, political, military, economic, social, environmental, educational, artistic, more...

major, technological, real, first, important, significant, great, scientific, big, decisive, next

new discovery,   leap forward,   break barriers,   big step ahead,   moon shot step,   pioneering step,   break though,   major progress,   big improvement,   major discovery