I discuss the relation between M-theory and M(atrix)-theory in flat space by
considering the effective potential for the scattering of two groups of
D0-branes in both theories. An explicit calculation of this potential up to two
loop order in M(atrix)-theory reveals a fascinating agreement. Lecture given at
Strings '97; June 17, 1997.Comment: 7 pages, latex, 1 figure. Lecture given at STRINGS9
