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Inhalable local anesthesia, fingerprint-scanning ATM machines, the BP oil spill and dead-weight sperm. What a week it has been… and what a future it will be. Check out some of our favorite stories this week, and win a free t-shirt.

Here are some of our favorite stories this week:

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As always, leave a comment to win this drawing on a shirt. We’ll announce our randomly chosen winner next week. Have a good weekend, everyone!