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We reconstruct the star formation history of the Sco-Cen OB association usinga novel high-resolution age map of the region. We develop an approach toproduce robust ages for Sco-Cen's recently identified 37 stellar clusters usingthe SigMA algorithm. The Sco-Cen star formation timeline reveals four periodsof enhanced star formation activity, or bursts, remarkably separated by about 5Myr. Of these, the second burst, which occurred about 15 million years ago, isby far the dominant, and most of Sco-Cen's stars and clusters were in place bythe end of this burst. The formation of stars and clusters in Sco-Cen iscorrelated but not linearly, implying that more stars were formed per clusterduring the peak of the star formation rate. Most of the clusters that are largeenough to have supernova precursors were formed during the 15 Myr period. Starand cluster formation activity has been continuously declining since then. Wehave clear evidence that Sco-Cen formed from the inside out and contains 100-pclong chains of contiguous clusters exhibiting well-defined age gradients, frommassive older clusters to smaller young clusters. These observables suggest animportant role for feedback in forming about half of Sco-Cen stars, althoughfollow-up work is needed to quantify this statement. Finally, we confirm thatthe Upper-Sco age controversy discussed in the literature during the lastdecades is solved: the nine clusters previously lumped together as Upper-Sco, abenchmark region for planet formation studies, exhibit a wide range of agesfrom 3 to 19 Myr.

The star formation history of the Sco-Cen association. Coherent star formation patterns in space and time