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News: This LEGO Mindstorms Submersible Can Be Piloted by Your Xbox Controller

Making little robots with a LEGO Mindstorms NXT set is already cool, but putting one underwater? Now that's just crazy. That didn't stop this engineer, who built a LEGO submarine that can not only maneuver around his fish tank, but can also be remotely controlled with his Xbox controller. The craft has a sealed battery compartment, exposed Power Functions motors, and features real-time communication between it and a laptop using a NXTbee wireless module.

A New Breed of Invertebrate: Half-Rat, Half-Silicone Cyborg Jellyfish

A team of scientists might have just put Jellyfish Art out of business with their new cyborg jellyfish. By arranging the heart cells of a normal rat on a piece of silicone, they've successfully created their own Franken-jellies. When in salt water with a fluctuating electrical field, the rat's heart muscles on the rubbery silicone contract the lobes downward and back up, which mimics the pulsing movement of a young moon jellyfish swimming.

News: Fully Functional DIY Pump Action Shotgun Made Out of Paper

This is no paper gun like you've ever seen before. Seriously. Tacome1942's homemade paper shotgun is a life-sized, fully functional Remington 870 replica. It would be hard to tell it apart from the real deal, not to mention it practically sounds like an authentic shotgun, too. The shotgun is made of approximately 97% paper, the remaining 3% consisting of pins, wires, and springs. Check out all the videos below to see the finer details, including the trigger group, shell stop, and disassembly ...

How To: Tell if a pearl is real

There’s nothing more special than a beautiful pearl necklace. But how do you know if they are real? Knowing some qualities that pearls have should help you determine when there is an obvious fake in your presence. It might ultimately be necessary to leave it to a professional to authenticate those pretty little presents from the sea.

How To: The Fastest Way to Share Your Location via Messages on Your iPhone

Apple makes it simple to share your location with your family and friends using tools built into the "info" page for each conversation thread in Messages. With those tools, you can send your current location or share trackable real-time coordinates. But iOS always has a few hidden tricks to make things easier than they seem, and that's precisely the case if all you need to do is share your current location.

News: Still Using an Older iPhone? This iOS 13 Feature Gives You Back Some Screen Real Estate

With over 200 brand new features, iOS 13 is a worthy update for all compatible devices. That said, not all iPhone models are created equal. There is a new feature only older iPhones will see, one that skips over Apple's Face ID devices entirely. So if you have a traditional Home button iPhone capable of running iOS 13 but haven't updated yet, this is one benefit you're missing out on.

How To: Play Pokémon GO in Fullscreen on Your OnePlus 6T

Phone displays have gotten taller in the past few years, and it seems the OnePlus 6T might not make use of the entire screen by default for a few games. Most games play nicely with the large display on the 6T and its teardrop camera notch, but Pokémon GO is one that doesn't scale correctly. Until an official fix happens, there's a quick workaround you can use to make things a bit better.

How To: Print These iPhone XR, XS & XS Max Cutouts to See Which Size Is Right for You

Combined, the new iPhone XR, XS, and XS Max are the largest suite of iPhones that Apple has ever released at once time. While the XS remains the same size as last year's iPhone X, the XR and XS Max are even larger. But which size is right for you? We can help you decide which will fit your hand best with printable cutouts to compare the sizes of Apple's latest and greatest.