Question: Something I couldn't figure out. The black fluid (in the glass cylinder) made Wikus start turning into an alien. If the aliens were mainly interested in going back to their planet, why had they been developing a substance that could turn humans into aliens? How would this help them go home?
Question: Was there ever an explanation given for how the humans and the prawns learned each others languages? Both speak only their native dialects yet they're able to communicate with each other perfectly fine.