  This work considers reversed evolution in dynamical systems. In particular,
asymptotic behavior of chaotic systems, when their orbits evolve backwards in
time. Reversed dynamics reveals important aspects of the trajectories, such as
a new necessary parameter. This is the strategy through which one orbit reaches
an original state in the past. As a result, it is found that backward orbits
exhibit sensitivity to the strategy. This gives additional evidence about the
unpredictability of the past
