  A discontinuous change in the size of an attractor is the most easily
observed type of global bifurcation. More generally, an explosion is a
discontinuous change in the set of recurrent points. An explosion often results
from heteroclinic and homoclinic tangency bifurcations. Newhouse and Palis
conjectured in 1976 that planar explosions are generically the result of either
tangency or saddle node bifurcations. In this paper, we prove this conjecture
for one-dimensional maps. Furthermore, we give a full classification for all
possible tangency bifurcations and whether they lead to explosions.
