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New evidence raises questions about timeline of Las Vegas shootings
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Police said Monday that the timeline of events on the night of the Las Vegas shootings was a little different than previously reported. - photo by Herb Scribner
Police said Monday that the timeline of events on the night of the Las Vegas shootings was a little different than previously reported, saying that a hotel security guard, believed to be the reason the shooting stopped, was actually shot six minutes before the shooting began, CNN reported.

Officials originally said that Stephen Paddock, the lone shooter in last Sundays mass attack that killed 58 people and injured more than 500, shot security guard Jesus Campos in the leg after he unleashed his attack on the Route 91 Harvey Festival crowd, according to The Los Angeles Times.

Authorities credited Campos with stopping the shooter, since the hotel guard turned Paddocks attention to the hallway.

But now, Clark County Sheriff Joe Lombardo said Monday that Campos was shot before the shooting began, roughly at around 9:59 p.m., and authorities now say they didnt know why Paddock stopped his attack on the crowd, The Los Angeles Times reported.

The new timeline suggests Paddock stopped firing from his 32nd floor hotel room at around 10:15 p.m., with police arriving on the 32nd floor two minutes later and finding Campos on the floor at 10:18 p.m.

Paddock had killed himself by the time police arrived at the room.

These developments frustrated Lombardo, who is reportedly stuck in a tough investigation that doesnt hold many answers.

He said Monday police are still unsure why Paddock stopped firing his weapons.

Im frustrated, Lombardo said, according to The Washington Post. Because this individual purposefully hid his actions leading up to this event, and it is difficult for us to find answers for those actions.

Investigators still question why the shooting began.

Lombardo said authorities have a rough picture of his life before the shooting, but know nothing that may have kicked off the massacre.

We do not believe there is one particular event in the suspects life for us to key on, he said. We believe he decided to take the lives he did and he had a very purposeful plan that he carried out.
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
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.