Ah, another week of great science and tech posts. This week, we’ve got a particularly robot-heavy TWitF t-shirt prize for one lucky reader. All you’ve got to do is tell us which of the stories featured in this week’s t-shirt design is your favorite and why, via either Facebook or Twitter.

The rules: Pick your favorite of the five stories featured in this week’s Baarbarian masterwork, and tell us why you picked it. You can do that via Twitter (follow us, and use the hashtag #TWitF so we can find you) or comment on the TWitF post on our Facebook page (and, of course, you can just buy the t-shirt here, if you’re into that whole exchanging-currency-for-goods-and/or-services thing, rather than social media contests). The stories are:

And here are some of our other favorite stories from this week:

And two more from our “What Could Possibly Go Wrong?” package: