The body will stay where it is, in the dark. The tunnel will keep its secret for now. More importantly, to remove the body would undo, to erase, an important part of their story. Whatever caused their demise is in the past and what we do now will not affect that.
Crouching next to the dead body for a closer look, the robot remarked “This is an old body. Several years since this particular antenna design was last used. And there’s no obvious signs of damage.”
I surveyed the scene. “Why is there even a dead body here? How could this happen?”
The other robot replied “This is an exceedingly rare event. And the environment hints at potentially anomalous circumstances.”
I looked into the gloom farther down the tunnel, suddenly wanting to be outside in the light.