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Have You Seen This? Drone replaces a lightbulb
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How many drones does it take to replace a lightbulb? Apparently two. - photo by Mary Dalrymple
Mary Dalrymple
KSL.com
Published: Nov 1, 2016, 1:00 PM


ROBOT LAND How many drones does it take to replace a lightbulb? Apparently two.

The thought of relaxing on the couch while your remote control drone does mundane household tasks is pretty appealing, in theory. We already love Roombas, if only because they make great DJs. But is it a realistic hope that we might be able to use drones to do everyday things like replace our lightbulbs?

The answer, as seen in this video, is that it requires a pretty skilled drone pilot. YouTube channel Marek Baczynski tests out this idea with a drone that attempts to both unscrew an old lightbulb and replace it with a new one.

According to the video description, it took two drones and about nine lightbulbs to make this work. As you watch the drone drop several lightbulbs, bump into the light fixture, and crash down onto the floor multiple times, you'll start to wonder if this is a futuristic dream we'll never achieve. But keep watching until the end of the video you'll realize we are already living in the future.
Its toxic: New study says blue light from tech devices can speed up blindness
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A new study from the University of Toledo found that blue light from digital devices can transform molecules in your eyes retina into cell killers. - photo by Herb Scribner
Herb Scribner
Deseret News
Published: Aug 13, 2018, 1:39 PM
It turns out checking Twitter or Facebook before bed is bad for your health.

A new study from the University of Toledo found that blue light from digital devices can transform molecules in your eyes retina into cell killers.

That process can lead to age-related macular degeneration, which is a leading cause of blindness in the United States, according to the researchs extract.

Blue light is a common issue for many modern Americans. Blue light is emitted from screens, most notably at night, causing sleep loss, eye strain and a number of other issues.

Dr. Ajith Karunarathne, assistant professor in the UT Department of Chemistry and Biochemistry, said our constant exposure to blue light cant be blocked by the lens or cornea.

"It's no secret that blue light harms our vision by damaging the eye's retina. Our experiments explain how this happens, and we hope this leads to therapies that slow macular degeneration, such as a new kind of eye drop, he said.

Macular degeneration is an incurable eye disease that often affects those in their 50s or 60s. It occurs after the death of photoreceptor cells in the retina. Those cells need retinal to sense light and help signal the brain.

The research team found blue light exposure created poisonous chemical molecules that killed photoreceptor cells

"It's toxic. If you shine blue light on retinal, the retinal kills photoreceptor cells as the signaling molecule on the membrane dissolves," said Kasun Ratnayake, a Ph.D. student researcher working in Karunarathne's cellular photo chemistry group. "Photoreceptor cells do not regenerate in the eye. When they're dead, they're dead for good."

However, the researchers found a molecule called alpha-tocopherol, which comes from Vitamin E, can help prevent cell death, according to Futurism.

The researchers plan to review how light from TVs, cellphones and tablet screens affect the eyes as well.

"If you look at the amount of light coming out of your cellphone, it's not great but it seems tolerable," said Dr. John Payton, visiting assistant professor in the UT Department of Chemistry and Biochemistry. "Some cellphone companies are adding blue-light filters to the screens, and I think that is a good idea."

Indeed, Apple released a Night Shift mode two years ago to help quell blue lights strain on the eyes, according to The Verge. The screen will dim into a warmer, orange light that will cause less stress on the eyes.