What if... one of your experiments starts killing people? *Lightning flashes* We know that there'll be a lab, and we know that we'll be able to examine aliens and such. Now I suggest, that there's a 5% (ish) that each time you experiment on aliens, you end up creating a dangerous lifeform that breaks out and starts wrecking the spacestation. The new lifeform would look somewhat like the one you were experimenting on, but obviously mutated in some way, far more dangerous. There'll be a few different types, stealthy one that crawls around in vents and killing the crew without alerting anyone, brutish one, relying on toughness and strength to off the station without the need for subtetly and finally, an experiment that has the capability to dominate others bodies, turning them into zombies that do the experiments bidding. Bringing down this monstrosity would take incredible effort, as it is both tough and smart. You can however, always avoid even the chance by not experimenting on anything bigger than a rabbit, but this would mean that your research would go slower. Risk, and reward people, risk and reward.