  We analyze the exchange of information in different cosmological backgrounds
when sender and receiver are timelike separated and communicate through
massless fields (without the exchange of light-signals). Remarkably, we show
that the dominance of a cosmological constant makes the amount of recoverable
information imprinted in the field by the sender extremely resilient: it does
not decay in time or with the spatial separation of sender and receiver, and it
actually increases with the rate of expansion of the Universe. This is in stark
contrast with the information carried by conventional light-signals and with
previous results on timelike communication through massless fields in matter
dominated cosmologies.
