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Apple has yet to announce an updated version of 2011's Thunderbolt Display, but pretty soon it won't be selling the old one either. The company will sell through any existing stock in the online and brick-and-mortar Apple Stores, but it doesn't plan to continue manufacturing the current model.

According to a statement given to TechCrunch, Apple is pointing its users toward third-party monitors. There are plenty of these and they come in all different sizes and screen resolutions and panel qualities and prices, though none offer actual Thunderbolt activity; regular USB hubs are far more common.

Some pre-WWDC scuttlebutt indicated that Apple is working on a 5K Retina version of the Thunderbolt Display, possibly with its own dedicated GPU to work around bandwidth limitations of the DisplayPort 1.2 spec. That monitor never materialized, but it could still show up as part of a Mac-related push when Apple updates its MacBook Pros and other computers. These refreshes are said to be coming later this year.

On Thursday, Detroit automaker General Motors and the US Navy announced a partnership in which the Navy would be able to take advantage of hydrogen fuel cell research from GM to develop a long-endurance unmanned undersea vehicle (UUV).

According to Karen Swider-Lyons, the head of the Naval Research Laboratory’s (NRL) Chemistry Division of its Alternative Energy Section, the Navy is looking for “weeks if not months of endurance” from a UUV. She stressed that research and testing is still in early stages, and that the Navy had not yet pinpointed a single application it wanted to apply fuel-cell powered underwater drones to. “As the technology becomes available we’ll see,” Swider-Lyons said on a conference call this morning. “You can look at the history of unmanned air vehicles and guess.”

Fuel cell technology has been lauded as a potentially revolutionary energy source for zero-emissions vehicles, using hydrogen to create electricity and emitting H₂O as waste. While fuel-cells are more energy dense than batteries, batteries have generally won out when it comes to building zero-emissions cars because hydrogen refueling centers are scarce and storing hydrogen itself can require a high-pressure container or very cold temperatures.

Researchers have detected a family of malicious apps, some that were available in Google Play, that contain malicious code capable of secretly rooting an estimated 90 percent of all Android phones.

In a recently published blog post, antivirus provider Trend Micro said that Godless, as the malware family has been dubbed, contains a collection of rooting exploits that works against virtually any device running Android 5.1 or earlier. That accounts for an estimated 90 percent of all Android devices. Members of the family have been found in a variety of app stores, including Google Play, and have been installed on more than 850,000 devices worldwide. Godless has struck hardest at users in India, Indonesia, and Thailand, but so far less than 2 percent of those infected are in the US.

Once an app with the malicious code is installed, it has the ability to pull from a vast repository of exploits to root the particular device it's running on. In that respect, the app functions something like the many available exploit kits that cause hacked websites to identify specific vulnerabilities in individual visitors' browsers and serve drive-by exploits. Trend Micro Mobile Threats Analyst Veo Zhang wrote:

Ars Technica Live #3. Filmed by Chris Schodt, edited by Jennifer Hahn. (video link)

In our third episode of Ars Technica Live, your intrepid hosts Annalee Newitz and Cyrus Farivar talked to journalist Sarah Jeong about online harassment. Jeong is the author of The Internet of Garbage, a book about how companies and online communities are using technology to cope with harassment and bullying. Watch the video, filmed before a live audience of Ars readers in Oakland, California at Longitude Bar.

Editor's Note: Our apologies for the sound issues. You can hear everything, but there are some crackles and annoyances. We promise to have that fixed for our episode next month.

The pictures that came from New Horizons' flyby of Pluto have set off a scramble to make sense of the dwarf planet's terrain. Pluto's clearly geologically active, with mountains and fresh surfaces that haven't been pummeled by impacts yet. One of those features, Sputnik Planum, appears to be an ocean of frozen nitrogen, fed by nitrogen glaciers that line its shores. But a new analysis suggests that this isn't the only ocean on the dwarf planet.

An analysis of the internal structure and heating of Pluto indicates that there are two likely probabilities: either it has a deep ocean of liquid water, or the water on Pluto has frozen solid and compacted into a dense form of ice called ice II. And the authors of the analysis suggest that the liquid ocean makes more sense given Pluto's surface features.

The analysis was done in a similar manner to the ones that tackled Sputnik Planum: figure out Pluto's composition and its heat budget and trace the effects of the heat as it escapes to the surface. The heat itself comes from Pluto's rocky core, which carries some of the same radioactive isotopes that help keep the Earth's core nice and toasty. Above that, however, Pluto is mostly water, with difficult-to-determine fractions of things like ammonia and methane.