Bioengineering Student Is Building Custom Prosthetic Arms From LEGO Bricks

iStock.com/serts
iStock.com/serts

The custom LEGO designs built by 19-year-old David Aguilar aren't meant to sit on a shelf. For years he's been ignoring the instructions that come with LEGO sets to make functioning prosthetic arms for himself, and now he's sharing his creations online, Reuters reports.

Aguilar—who lives in Andorra, a small principality on the French-Spanish border—was born with a rare genetic condition that left him without a right forearm. He built his first artificial limb out of LEGO bricks at age 9, and hasn't looked back. Today Aguilar is pursuing an eduction in bioengineering at the Universitat Internacional de Catalunya in Spain, and he's already on LEGO prosthetic No. 4.

After acquiring complex LEGO sets for things like airplanes and construction vehicles, Aguilar reconfigures them into arms and adds electric motors that allow him to move his fingers and bend his elbow. He documents his building process on YouTube under the name Hand Solo. Each arm he builds is named MK followed by the model number (MK I, MK II, etc.), a nod to the MK suits built by Tony Stark in the Iron Man series.

The LEGO prosthetics are more than conversation starters—they're also affordable compared to professionally made robotic limbs on the market. Aguilar tells Reuters his dream is to one day provide cheaper options to prosthetics-wearers like him.

[h/t Reuters]

The FCC's New Scam Glossary Will Help You Identify Fraudulent Calls

Tero Vesalainen/iStock via Getty Images
Tero Vesalainen/iStock via Getty Images

The Federal Communications Commission (FCC) knows that robocalls have gotten worse in recent years, and it's finally doing something about it. In June 2019, the FCC voted to give phone carriers the freedom to block spam calls without waiting for customers to opt in. The change is a good first step, but it won't end the robocall scourge completely. For the unwanted calls that sneak past your phone's defenses, the FCC also published a scam glossary on its website, Popular Science reports.

The glossary lists some of the most common (as well as some uncommon) strategies used by criminals, giving you an idea of what to be on the lookout for next time you get a suspicious call. The "Health Insurance Scam," for example, involves callers selling fake health care coverage for a cheap price. There's also the "One Ring Scam," where the scammer will hang up quickly after the first ring without giving you time to answer the call. Their goal is to trick you into calling them back and paying for international call fees.

The glossary includes more general terms that relate to phone scams as well. Spoofing is defined as calls made through fake caller IDs that appear trustworthy, either by matching your home area code or that of a legitimate organization. Slamming happens when a phone company moves you from your existing service provider to theirs without your consent.

Familiarizing yourself with popular scams is one of the easiest ways to protect yourself from falling for fraudulent calls. Another way is to install robocall-blocking apps on your phone. Here are some options to check out.

[h/t Popular Science]

Fish Tube: How the 'Salmon Cannon' Works and Why It's Important

PerfectStills/iStock via Getty Images
PerfectStills/iStock via Getty Images

If you’ve been on the internet at any point in the past week, you’ve certainly come across footage of wildlife conservationists stuffing salmon into a giant plastic tube and shuttling them over obstacles. It’s so bizarre—even by the already loose standards of the web—that it briefly ignited discussions over fish welfare, its purpose, and the seeming desire of people to be similarly transported through a pneumatic tunnel into a new life.

Naturally, the “salmon cannon” has a mission beyond amusing the internet. The system was created by Whooshh Innovations, a company that essentially adopted the same kind of transportation system featuring pressurized tubing that's used in banking. Initially, the system was intended to transport fruit over long distances without bruising. At some point, engineers figured they could do the same for fish.

The fish payload is secured at the entrance of the tube—acceptable species can weigh up to 34 pounds—and moves through a smooth, soft plastic tube that conforms to their body shape. Air pressure behind them keeps them moving. The fish are jettisoned between 16 and 26 feet per second to a new location, where they emerge relatively unscathed. Because there’s no need for a water column, the tubing can cover most terrain at virtually any height.

The tubing solution is a human answer to a human problem: dams. With fish largely confined to still bodies of water thanks to dams and facing obstacles swimming upstream to migrate and spawn, fish need some kind of assistance. In the past, “fish ladders” have helped fish move upstream by providing ascending steps they can flop on, but not all fish can navigate such terrain. Another system, trapping and hauling fish like cargo, results in disoriented fish who can even forget how to swim. The Whooshh system, which has been in used in Washington state for at least five years, allows for expedient fish export with an injury rate as little as 3 percent, although study results have varied.

The video features manual insertion of the fish. In the wild, Whooshh counts on fish making semi-voluntary entries into the tubing. Once they swim into an enclosure, they’re curious enough about the tube to go inside.

If all goes well, the system could help salmon be reintroduced to the Upper Columbia River in Washington, where the population has been depleted by dams. Testing of the device there is awaiting approval from the U.S. Army Corps of Engineers.

[h/t Popular Mechanics]

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