A quick and handy guide to audio file formats

The fine folks at Techquickie put together a quick overview that takes the mystery out of the dizzying array of audio file formats, including when to use what and brief histories of the most common types. Read the rest

Modding a recurve bow to make it quieter

YouTuber Survival Lilly has tons of information on how to build a survival camp in any conditions. In this video, she mods a commercially available recurve bow for stealthier hunting. Read the rest

Asia's toothpick crossbow fad is even worse than our fidget spinner fad

We survived bottle flipping and fidget spinners, but will the next big fad be dangerous modded toothpick crossbows that shoot nails more than half the length of a football field? Read the rest

Fun T-shirts with erasable chalkboards

In this charming video, Giselle shows how easy it is to create a temporary masterpiece on a washable and erasable chalkboard t-shirt. Read the rest

'From the Ashes' examines coal's environmental devastation

As the Trump Administration works to take America back to the coal age, From the Ashes takes an unflinching look at the industry's profound effect on the environment, with a focus on Appalachia. Read the rest

Trippy 3D-printed spheres that help conceptualize 4D

Henry Segerman takes a brisk stroll through the world of four-dimensional objects with some really cool 3D-printed sculptures, like this sphere that projects a square grid when lit: Read the rest

Watch white-knuckle speed flying through narrow gorges

Speed flyer Joseph Innes headed to Romania for this pulse-pounding speed flying trip through canyons and gullies. The low-visibility flights in fog are especially thrilling. Read the rest

Watch tandem drones use wifi to map a building's interior

This novel mapping technique developed by Yasamin Mostofi allows two drones to map the interior of an unknown building by using wifi signals and some impressive number-crunching. Read the rest

Giant high-tech rooftop greenhouse uses no soil

Lufa Farms is a commercial rooftop greenhouse built in 2010, one of three such gardens that help feed 2% of Montreal. Read the rest

What happens to a levitating gyroscope in a vacuum?

The Action Lab took a maglev gyroscope and placed it inside a sealed chamber to see what happens to a levitating gyroscope in a vacuum.

A lot of people took issue with the experiment's setup and explanation, but it's interesting nonetheless. He responded to those concerns:

Hi everyone! I see a lot of comments that mention it will stop because of gravity. A lot of people said that in my pendulum video also. But remember that gravity doesn't "slow things down." The only reason we associate gravity with slowing things down is because it pulls things toward the earth and they hit the earth and the friction causes it to stop. So friction is the stopping force, not gravity. But you are right, gravity does play a role here that I didn't mention in the video. That is that it causes precession in the gyroscope. Since it never started out initially straight up, gravity does make the gyroscope tip over eventually. This may be even a larger factor than the magnet friction I talked about.

Will a Levitating Gyroscope Spin Forever in a Vacuum Chamber? (YouTube / The Action Lab) Read the rest

Artist proves that basic school supplies work fine for making art

YouTuber Peter Draws accepted a viewer challenge and created two lovely sketches using basic school supplies: a standard No. 2 Pencil, a wide ruled composition book, and a manual pencil sharpener. Read the rest

Surf videos of your kid are really easy to make

It is really easy to affix a camera to any foam board these days! This video was quite literally our first wave.

I'm using these stab-through-the-board style GoPro mounts.

Choose a location on top of the board where you want the camera. It is likely far more interesting to have the camera facing you in its default, and most secure position. If you want other angles, You can use the myriad go-pro and tripod mount adaptors to work it out. Remember the mount is designed with foam cutting blades that'll hold it steady in the board while you rush down the faces of awesome waves. Pushing it into place will permanently scar the board, so removing the mount is a bad idea. Installing is a 1-time thing, so get it right.

You'll need a large diameter, Phillips head screwdriver, and a quarter. Again, installing one of these is a breeze if you give it a little bit of thought. Not thinking may result in ruining the board. If your board has a slick, laminated on kevlar/plastic type bottom and not exposed foam in a net style material, make sure to puncture the board THROUGH that layer (in the bottom and out the top,) because puncturing from the other direction will tear that layer loose. You MUST puncture a hole where you want to insert the mount to a) start the process and b) leave a clear channel for screwing the thing together.

Insert the top piece with some force, centering the piece over the starter hole. Read the rest

Watch a mesmerizing stop-motion video using wood grain

"WoodSwimmer" is a single from Bedtimes with a remarkable video by Brett Foxwell. In it, Foxwell laboriously sanded and sliced thin pieces of wood from large logs to create hypnotic patterns from the wood grain. Read the rest

DuckTales reboot is on the way

If you or your kids are of a certain age, DuckTales may play a large role in your late-80s/early-90s nostalgia. Disney is bringing the show back, and the new opening sequence by Golden Wolf pays homage to some iconic shots while giving it a pretty cool update. Read the rest

Trippy and gorgeous night sky petunias look like tiny universes

Does your garden of earthly delights have room for some out-of-this-world petunias? Night Sky petunias are a cultivar by Selecta, developed in part at Mississippi State University's trial gardens. Read the rest

Strobe flashes leave dancer's fleeting shadows on photosensitive screen

Yes We Mystic's video for "Working for the Future in the Interlake" is simple yet beautiful. As a dancer performs to the song, her silhouette gets faintly imprinted on a glow-in-the-dark screen behind her. Read the rest

Guy nearly maims his ladyfriend with rocket-powered fidget spinner

As we descend from Peak Fidget Spinner into its decadent phase, expect to see more of this. The Backyard Scientist discovered that hiding behind a flimsy plastic folding table is no match for rocket-propelled debris from a fidget spinner experiment gone wrong. Read the rest

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