Dead bodies of Heater and Split.
Heater was a member of the Resistance and a crewmember of an unnamed hovercraft along with fellow crew mates Mac and Split.
During a recon flight, Heater suggested to Mac and Split that they examine one of the fetus fields. Both of them rejected his idea but he was able to convince them that, by using the dumping grounds as cover, they could avoid the detection of the Machines.
However, flying a little too low to the dumping grounds, something clipped their ship and ruptured their starboard input tank and their ship crashed. Mac was able to survive but both Heater and Split died on impact.