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(credit: Jeso Carneiro)

A Brazilian judge has ordered the release of a Facebook executive one day after he was jailed in São Paulo for "repeated non-compliance with court orders," according to the Agence France Presse. Facebook spokesman Matt Steinfeld confirmed to Ars that executive Diego Dzodan has indeed been released.

Dzodan was arrested (Portuguese) after apparently refusing to provide WhatsApp messages that the Brazilian police sought in connection with a drug case. Since late 2014, all WhatsApp messages sent between Android devices are end-to-end encrypted, which means that not even parent company Facebook can access their plaintext contents. (WhatsApp messges that involve an iOS device are not end-to-end encrypted.)

Judge Ruy Pinheiro described Dzodan’s detention as "unlawful coercion," according to the AFP.

(credit: Mark Linfield/Walt Disney Pictures, CC BY)

Camera trap footage, taken with no humans present to cause a disturbance, shows one chimp after another pick up a rock and hurl it at the same tree. Rocks pile up at the foot of the tree, which starts to show signs of wear and tear. For some reason, the chimps have picked this particular tree for an accumulation of hurled rocks.

“It was unlike anything I had ever observed among wild chimpanzees,” said primatologist Ammie Kalan. Her team has discovered the behavior in four distinct populations, and it’s possible that more will turn up as they continue searching. What the rock piles mean is an open question, but the discovery of such a distinct and puzzling stone tool use is unquestionably exciting.

We’ve known for a while now that chimps use stone tools for more easily discernible purposes, like extracting food. They’ve also been observed throwing objects, like rocks and branches, haphazardly. What’s different about this behavior is the consistent location and the repetitive actions seen in multiple individuals, which is what has led the researchers to label it as tool use. “It’s definitely the first indication of something else going on other than stone tool use for food extraction or for throwing rocks… haphazardly,” Kalan told Ars.

(credit: VESA)

Today, most new computers with DisplayPort or USB Type-C connectors support the DisplayPort 1.2 standard, which provides enough bandwidth to drive a 4K display at 60Hz over a single cable. In late 2014, VESA published the DisplayPort 1.3 standard, which increased the available bandwidth enough to drive 60Hz 5K displays or 30Hz 8K displays over a single cable. And today, VESA has finalized and released the DisplayPort 1.4 spec, which can drive 60Hz 8K displays and supports HDR color modes at 5K and 8K.

The physical interface used to carry DisplayPort data—High Bit Rate 3 (HBR3), which provides 8.1Gbps of bandwidth per lane—is still the same as it was in DisplayPort 1.3. The new standard drives higher-resolution displays with better color support using Display Stream Compression (DSC), a "visually lossless" form of compression that VESA says "enables up to [a] 3:1 compression ratio." This data compression, among other things, allows DisplayPort 1.4 to drive 60Hz 8K displays and 120Hz 4K displays with HDR "deep color" over both DisplayPort and USB Type-C cables. USB Type-C cables can provide a USB 3.0 data connection, too.

The standard includes a few other features, most of which are targeted at home theater buffs: