The kicker is that DARPA needs an answer quickly — it only posted the notice on August 20th, and any evil geniuses tunnel owners have until August 30th at 5PM Eastern to offer their spaces.

And of course, DARPA hasn’t said just why it needs this area to begin with. A lair for a Demogorgon? An Us-style tunnel? An area to conduct alien autopsies? The boring reality is that it’s probably meant for non-sinister purposes like studying radio waves, but that isn’t about to stop people’s vivid imaginations — we’ve seen a few sci-fi horror movies start out this way.

At the same time, Uber is planning to bring its electric JUMP bicycles to cities across Europe. As we saw in San Francisco, the bike service can cut into car rides. But Uber doesn’t seem concerned that the added transport options will deter ridesharing customers. “This is central to Uber’s efforts to reduce private car ownership, clean up London’s air and make the city a healthier place to live,” the company said in a press release.

In January, Uber brought a similar public transportation feature to its app in Denver. We were told then that the company was partnering with other agencies and making it easier to integrate public transit info. There’s a good chance London and Denver are just two of several cities where Uber will attempt to become an all-encompassing transportation app.