Near-horizon brane-scan revived

In 1987 two versions of the brane-scan of D-dimensional super p  -branes were put forward. The first pinpointed those (p,D)(p,D) slots consistent with kappa-symmetric Green–Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing p  -branes on the boundary of AdSp+2×SD−p−2AdSp+2×SD−p−2. Although the second version predicted D3- and M  5-branes in addition to those of the first, it came unstuck because the 1/2 BPS solitonic branes failed to exhibit the required symmetry enhancement in the near-horizon limit, except in the non-dilatonic cases (p=2,D=11)(p=2,D=11), (p=3,D=10)(p=3,D=10) and (p=5,D=11)(p=5,D=11). Just recently, however, it has been argued that the fundamental D=10D=10 heterotic string does indeed display a near-horizon enhancement to OSp(8|2)OSp(8|2) as predicted by the brane-scan, provided α′α′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21-year-old paradox and provide a wealth of new AdS/CFT dualities, which we tabulate.