  In order for string theory to be made compatible with the low-energy
observations of a positive cosmological constant, there have been attempts to
construct dS vacua in string theory which are particularly difficult to
realize. Instead of attempting to find de Sitter (dS) vacuum solutions, we
point to a new way to make string theory consistent with low-energy dS
cosmology. In this way, string theory lives in an anti-de Sitter (AdS) vacuum
(which is simple to construct) that exists only in the high-energy regime;
however, as going to the low-energy scales where the heavy string excitations
and Kaluza-Klein modes are integrated out, we show that the effective picture
of string theory in lower dimensions would exhibit a 4D dS vacuum without
needing to add additional structures such as anti-D3 branes. Additionally, we
point to evidence from bottom-up physics for the strong version of the AdS
distance conjecture realized from AdS vacua in string theory. This evidence
hence supports the sharpening of the AdS distance conjecture as one of the
universal features of quantum gravity.
