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An Inconvenient Test

Cave Johnson. Chariots chariots. It's come to my attention that this thing called "global warming" is eventually gonna wipe us all out. Then, I thought, "when everyone's wiped out, who's gonna do the science"? That's why I've taken the liberty of going into this test chamber and placing one copy of "Repopulating the Species for Dummies" in there for you all to share. Oh, by the way, the lab boys tell me there's some secret room in here that they put in just for fun, so you should keep an eye out for it. I seriously doubt those geeks know anything about fun, but try to find it anyway. Cave Johnson, we're done here.

UPDATE: Revised so you must use the excursion funnel to get the sphere.