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Have You Seen This? Grizzly bear is kid at heart
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No Caption - photo by Martha Ostergar
Martha Ostergar
KSL.com
Published: Sep 11, 2015, 1:09 PM
CHILDHOOD Weve heard it all before, do we as humans ever really grow up?

Well probably argue about it forever, especially when grown men make potty jokes and grown women get silly over an attractive male. (Yes, I know I just reduced everyone to gross stereotypes for my own purposes, but Ill allow it.)

But heres a new layer to the argument, do bears ever really grow up?

As evidence toward the no side of the argument, consider this video captured by tourists in the Denali National Park and Preserve in Alaska. The group giggles in amazement as a seemingly full-grown grizzly bear rolls down a grassy hill, in a bear-el roll, if you will. (I will not apologize for that terrible joke.)

Basically the bear looks like any kid who has encountered a grassy hill, including me in my youth.

This evidence can be added to other videos like this family of black bears taking a swim, this bear gleefully diving in to a pool like a puppy and this bear trying to get a colorful flag on a golf course.

You may draw your own conclusions from the evidence.

Personally, Ive never seen the like, and I was truly amazed and delighting by the bears seemingly carefree frolic. But dont think for a second that I didnt come to my senses quickly to realize that a bear is a bear is a bear that could kill me with one paw swipe. So after you watch the video to experience its delightfulness, I advise you still respect and fear bears for the wild animals they are.
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.