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We’ve made it through another week, which means it’s time to look back at the past five days of science and tech before we move forward into the next. As always, this also means you’ve got a chance to win a t-shirt with Baarbarian’s fantastic PopSci-inspired design. This week, that design includes mice, rats, Androids, and hemp–a winning combination if we’ve ever seen one.

The rules: Pick your favorite of the four 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: