Could Moon Dust Help Reduce Global Temperatures?

October 10, 2023 by Lewin Day 66 Comments

The impacts of climate change continue to mount on human civilization, with warning signs that worse times are yet to come. Despite the scientific community raising an early warning as to the risks of continued air pollution and greenhouse gas output, efforts to stem emissions have thus far had minimal impact. Continued inaction has led some scientists to consider alternative solutions to stave off the worst from occurring.

Geoengineering has long been touted as a potential solution for our global warming woes. Now, the idea of launching a gigantic dust cloud from the moon to combat Earth’s rising temperatures is under the spotlight. However, this very sci-fi solution has some serious implications if pursued, if humanity can even achieve the feat in the first place.

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A Raspberry Pi 5 Is Better Than Two Pi 4s

September 28, 2023 by Elliot Williams 191 Comments

What’s as fast as two Raspberry Pi 4s? The brand-new Raspberry Pi 5, that’s what. And for only a $5 upcharge (with an asterisk), it’s going to the new go-to board from the British House of Fruity Single-Board Computers. But aside from the brute speed, it also has a number of cool features that will make using the board easier for a number of projects, and it’s going to be on sale in October. Raspberry Pi sent us one for review, and if you were just about to pick up a Pi 4 for a project that needs the speed, we’d say that you might wait a couple weeks until the Raspberry Pi 5 goes on sale.

Twice as Nice

On essentially every benchmark, the Raspberry Pi 5 comes in two to three times faster than the Pi 4. This is thanks to the new Broadcom BCM2712 system-on-chip (SOC) that runs four ARM A76s at 2.4 GHz instead of the Pi 4’s ARM A72s at 1.8 GHz. This gives the CPUs a roughly 2x – 3x advantage over the Pi 4. (Although the Pi 4 was eminently overclockable in the CM4 package.)

The DRAM runs at double the clock speed. The video core is more efficient and pushes pixels about twice as fast. The new WiFi controller in the SOC allows about twice as much throughput to the same radio. Even the SD card interface is capable of running twice as fast, speeding up boot times to easily under 10 sec – maybe closer to 8 sec, but who’s counting?

Heck, while we’re on factors of two, there are now two MIPI camera/display lines, so you can do stereo imaging straight off the board, or run a camera and external display simultaneously. And it’s capable of driving two 4k HDMI displays at 60 Hz.

There are only two exceptions to the overall factor-of-two improvements. First, the Gigabyte Ethernet remains Gigabyte Ethernet, so that’s a one-ex. (We’re not sure who is running up against that constraint, but if it’s you, you’ll want an external network adapter.) But second, the new Broadcom SOC finally supports the ARM cryptography extensions, which make it 45x faster at AES, for instance. With TLS almost everywhere, this keeps crypto performance from becoming the bottleneck. Nice.

All in all, most everything performance-related has been doubled or halved appropriately, and completely in line with the only formal benchmarks we’ve seen so far, it feels about twice as fast all around in our informal tests. Compared with a Pi 400 that I use frequently in the basement workshop, the Pi 5 is a lot snappier.

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The Oldest Living Torrent Is 20 Years Old

September 28, 2023 by Lewin Day 41 Comments

Twenty years ago, in a world dominated by dial-up connections and a fledgling World Wide Web, a group of New Zealand friends embarked on a journey. Their mission? To bring to life a Matrix fan film shot on a shoestring budget. The result was The Fanimatrix, a 16-minute amateur film just popular enough to have its own Wikipedia page.

As reported by TorrentFreak, the humble film would unknowingly become a crucial part of torrent history. It now stands as the world’s oldest active torrent, with an uptime now spanning a full 20 years. It has become a symbol of how peer-to-peer technology democratized distribution in a fast-changing world.

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Do Bounties Hurt FOSS?

September 27, 2023 by Maya Posch 17 Comments

As with many things in life, motivation is everything. This also applies to the development of software, which is a field that has become immensely important over the past decades. Within a commercial context, the motivation to write software is primarily financial, in that a company’s products are developed by individuals who are being financially compensated for their time. This is often different with Free and Open Source Software (FOSS) projects, where the motivation to develop the software is in many cases derived more out of passion and sometimes a wildly successful hobby rather than any financial incentives.

Yet what if financial incentives are added by those who have a vested interest in seeing certain features added or changed in a FOSS project? While with a commercial project it’s clear (or should be) that the paying customers are the ones whose needs are to be met, with a volunteer-based FOSS project the addition of financial incentives make for a much more fuzzy system. This is where FOSS projects like the Zig programming language have put down their foot, calling FOSS bounties ‘damaging’.

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Inverse Vaccines Could Help Treat Autoimmune Conditions

September 25, 2023 by Lewin Day 78 Comments

Autoimmune diseases occur when the immune system starts attacking the body’s own cells. They can cause a wide range of deleterious symptoms that greatly reduce a patient’s quality of life. Treatments often involve globally suppressing the immune system, which can lead to a host of undesirable side effects.

However, researchers at the University of Chicago might have found a workaround by tapping into the body’s own control mechanisms. It may be possible to hack the immune system and change its targeting without disabling it entirely. The new technique of creating “inverse vaccines” could revolutionize the treatment of autoimmune conditions.

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Scientists Call Out Apollo 17 After Investigating Moonquakes Past

September 19, 2023 by Lewin Day 35 Comments

In the vast realm of space exploration, new discoveries often emerge from old data. Thanks to advanced algorithms and keen observers, the seismic activities of our closest celestial neighbor, the Moon, have recently been thrust back into the limelight.

Thanks to the effort of the NASA crew involved in the Apollo 17 mission, it’s possible investigate these phenomena today with datasets from the past. Recently, researchers working with this data turned up some intriguing findings, and published them in a new paper. It reveals that one unexpected source of moonquakes could be the very equipment that Earth’s astronauts left behind. Continue reading “Scientists Call Out Apollo 17 After Investigating Moonquakes Past” →

Determining The Size Of The New US Lithium Deposit Amidst Exploding Demand

September 13, 2023 by Maya Posch 22 Comments

With demand for lithium in the world market projected to increase by 2040 to as much as eight times the demand in 2022, finding new deposits of this metal has become a priority. Currently most of the world’s lithium comes from Australia, Chile, China and Argentina, with potential new mining sites under investigation. One of these sites is the McDermitt caldera in the US, a likely remnant of the Yellowstone hotspot and resulting volcanic activity. According to a recent study (Chemistry World article) by Thomas R. Benson and colleagues in Science Advances, this site may not only contain between 20 to 40 million tons of lithium in the form of the mineral clay illite, but was also formed using a rather unique process.

This particular group of mineral clays can contain a number of other chemicals, which in this particular case is lithium due to the unique way in which the about 40 meter thick layer of sediment was formed. Although lithium is a very common metal, its high reactivity means that it is never found in its elementary form, but instead bound to other elements. Lithium is thinly distributed within the Earth’s crust and oceans. Incidentally, the Earth’s oceans contain by far the largest amount of lithium, at approximately 230 billion tons.

So how much lithium could be extracted from this new area, and how does this compare to the increasing demand?

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