A database of paper airplanes with easy to follow folding instructions.

Uninstall tracking exploits a core element of Apple Inc.’s and Google’s mobile operating systems: push notifications. Developers have always been able to use so-called silent push notifications to ping installed apps at regular intervals without alerting the user—to refresh an inbox or social media feed while the app is running in the background, for example. But if the app doesn’t ping the developer back, the app is logged as uninstalled, and the uninstall tracking tools add those changes to the file associated with the given mobile device’s unique advertising ID, details that make it easy to identify just who’s holding the phone and advertise the app to them wherever they go.

The tools violate Apple and Google policies against using silent push notifications to build advertising audiences, says Alex Austin, CEO of Branch Metrics Inc., which makes software for developers but chose not to create an uninstall tracker. “It’s just generally sketchy to track people around the internet after they’ve opted out of using your product,” he says, adding that he expects Apple and Google to crack down on the practice soon. Apple and Google didn’t respond to requests for comment.

VIP tour of the Swedish Parliament this afternoon. Many thanks to our guide, MP Olle Thorell!

The flight data recorder revealed that frigatebirds sleep in both expected and unexpected ways during flight. During the day the birds stayed awake actively searching for foraging opportunities. As the sun set, the awake EEG pattern switched to a SWS pattern for periods lasting up to several minutes while the birds were soaring. Surprisingly, SWS could occur in one hemisphere at a time or both hemispheres together. The presence of such bihemispheric sleep indicates that unihemispheric sleep is not required to maintain aerodynamic control. Nonetheless, when compared to sleep on land, SWS was more often unihemispheric in flight.

What should have been a heart-wrenching meeting with plans to make changes for the future instead ended up boiling down to one poor choice of words on behalf of the superintendent.

At some point during the conversation with the boy’s father, the superintendent asked: Omae mo hogoshakai ni kuru ka? (お前も保護者会に来るか).

I’ve never stepped into a leadership role without it quickly becoming clear why a new leader was needed. I think it’s normal for companies to hire new leaders when there are problems that need to be addressed. So I suspect that as the congratulations die down, it’s also normal to look at the set of problems that surround you and ask, “Where do I begin?” (also normal: “What have I done?!”). I suggest instead starting with these two questions:

• How do I create clarity?
• How do I create capacity?

The reputation of DNA testing remains mostly untainted, rose-tinted by the mental imagery of white-coated techs working in spotless labs to deliver justice, surrounded by all sorts of science stuff and high-powered computers. In reality, testing methods vary greatly from crime lab to crime lab, as do the standards for declaring a match. People lose their freedom thanks to inexact science and careless handling of samples. And it happens far more frequently than anyone involved in crime lab testing would like you to believe.

Rote introduction dispensed with, Trump's solemn tone forecasted a serious, on-message speech. That is, until his very next sentence. "In less than two years, my administration has accomplished more than almost any administration in the history of our country," he said — prompting laughter from his audience. Trump interrupted himself to say his declaration was "so true," which only evoked heartier laughter from the crowd.