Connect with us


First-of-Its-Kind Study Finds Shining a Red Light Through the Eyelid for 3 Minutes Per Day Can Boost Failing Eyesight – Good News Network



Shining a deep red light for three minutes a day into your eye, even through the eyelid, can significantly improve declining eyesight, finds a new University College London-led study, the first of its kind in humans.

Scientists believe the discovery, published this week in the Journals of Gerontology, could help the millions of people globally with naturally declining vision by signaling the dawn of new affordable home-based eye therapies.

In the UK, there are currently around 12 million people over the age of 65—and all will have some degree of visual decline because of retinal aging.

“As you age, your visual system declines significantly, particularly once over 40,” said the study’s lead author Professor Glen Jeffery from the UCL Institute of Ophthalmology.

RELATED: Irreversible No Longer—Blind Mice See Again Thanks To New Method of Synthesizing Lost Cells

“Your retinal sensitivity and your color vision are both gradually undermined,” he continued. “To try to stem or reverse this decline, we sought to reboot the retina’s aging cells with short bursts of longwave light.”

The pace of aging in an eye’s retina is partially set when the cells’ mitochondria, whose role is to produce energy (known as ATP) and boost cell function, start to decline.

Mitochondrial density is greatest in the retina’s photoreceptor cells, which have high energy demands. As a result, the retina ages faster than other organs with a 70% ATP reduction over life, causing a significant decline in photoreceptor function as they lack the energy to perform their normal role.

MORE: ‘Breakthrough’ Device Restores Visual Perception to the Blind So They Can See Light and Motion

Researchers built on their previous findings in mice, bumblebees, and fruit flies, which all found significant improvements in the function of the retina’s photoreceptors when their eyes were exposed to deep red (long wavelength) light.

“Mitochondria have specific light absorbance characteristics influencing their performance: longer wavelengths spanning 650 to 1000nm are absorbed and improve mitochondrial performance to increase energy production, rather like re-charging a battery.” said Professor Jeffery.

Photo by the University of College London

The retina’s photoreceptor population is formed out of cones that mediate color vision, and rods, which provide peripheral vision and adapt vision in low/dim light.

At the start of the study, 24 people (12 male, 12 female) between the ages of 28 and 72 with no ocular disease were tested for the sensitivity of their rods and cones. Rod sensitivity was measured in dark adapted eyes (with pupils dilated) by asking participants to detect dim light signals in the dark, and cone function was tested by subjects identifying colored letters that had very low contrast and appeared increasingly blurred—a process called color contrast.

WATCH: Blind Man Develops Smart Cane That Uses Google Maps and Sensors to Identify One’s Surroundings

All participants were then given a small LED torch to take home and were asked to look into its deep red 670nm light beam for three minutes a day for two weeks (participants were free to close their eyes and place them over the devices since the red light is not filtered by the eye lid.) They were then re-tested for their rod and cone sensitivity.

The researchers found that although the 670nm light had no impact in younger individuals, significant improvements were obtained in those around 40 years old and over.

Cone color contrast sensitivity (the ability to detect colors) improved by up to 20%, particularly in the blue part of the color spectrum that is more vulnerable in aging. Rod sensitivity (the ability to see in low light) also improved significantly, though less than color contrast.

LOOK: Man Carries Blind Dog for 800 Miles So She Can Build Confidence Walking the Rest of the Epic Hike on Her Own

“Our devices cost about £12 to make, so the technology is highly accessible to members of the public.”

File photo by thamuna, CC

“Our study shows that it is possible to significantly improve vision that has declined in aged individuals using simple brief exposures to light wavelengths that recharge the energy system that has declined in the retina cells,” said Professor Jeffery. “The technology is simple and very safe, using a deep red light of a specific wavelength that is absorbed by mitochondria in the retina to supply energy for cellular function.

This research was funded by the Biotechnology and Biological Sciences Research Council.

Edited and reprinted article from University of College London

Help Your Friends See This Cool Story By Sharing It To Social Media…

Let’s block ads! (Why?)

Source link

Continue Reading


NASA's Perserverance rover to drill into Mars using part made on Vancouver Island – Yahoo News Canada



Local Journalism Initiative

Yukon First Nations say approving mineral exploration without a land use plan violates their rights

Two Yukon First Nations are renewing calls for a regional land use plan to be completed before any new development on their traditional territories is considered, including a mineral exploration project right next door to Tombstone Territorial Park. Tr’ondëk Hwëch’in First Nation and the First Nation of Na-Cho Nyäk Dun recently sent letters to the Yukon Environmental and Socio-economic Assessment Board stating that approving the quartz exploration project, called Antimony Creek, without a land use plan for the Dawson region would violate their rights. The board is in the midst of evaluating whether Ryanwood Exploration Inc., the Dawson City-based company behind the project, has provided enough information to develop the project without adversely affecting the environment. The assessment board is responsible for issuing recommendations to the Yukon and federal governments, which ultimately decide whether to greenlight a project. Regional land use plans determine what can and cannot occur in a particular region, essentially balancing conservation values, First Nations’ rights and industrial pursuits. These plans are created by independent commissions and signed off on by the Yukon government and affected First Nations. Creating them is a requirement under the Umbrella Final Agreement, which was signed by 11 First Nations in 1990 and paved the way for their self-governance. However, most First Nations have been waiting decades for these plans. Resource development in the absence of an approved land use plan “will negatively affect Tr’ondëk Hwëch’in rights under the Tr’ondëk Hwëch’in final agreement,” Tr’ondëk Hwëch’in’s Jan. 14 letter states. “This is unacceptable.” Antimony Creek is on Tr’ondëk Hwëch’in and Na-Cho Nyäk Dun territory and about 2.5 kilometres away from Tombstone, the territory’s flagship park that boasts towering, jagged peaks and abundant wildlife. The project is in an area of great importance to Tr’ondëk Hwëch’in, whose citizens frequently harvest plants and wildlife for cultural and subsistence purposes. Traditional gravesites and heritage travelling routes are a short distance away from the project area. According to the company’s April 2020 permit application, up to 300 holes will be drilled per year, with some burrowing 10,000 metres into the earth, to find what appears to be gold and silver deposits. The 10-year project involves the construction of an access road, a network of trails and a drill pad. The company is proposing up to 883 round-trip helicopter flights on an annual basis to transport workers and supplies. According to GeoYukon, a Yukon government mapping tool, the project area covers roughly 86 square kilometres. Ryanwood Exploration Inc. didn’t return a request for comment. In its permit application, the company said First Nations haven’t been engaged, “but discussions will be conducted.” According to a 2020 assessment board report, the company intends to regularly host discussions with affected First Nations “to ensure that this project does not adversely affect surrounding local and First Nations lands, culture and people.” The Dawson Regional Planning Commission is in the process of developing a land use plan that will manage and monitor lands, waters and industry within the region — a roughly 40,000 square-kilometre area representing about 10 per cent of the territory’s land mass. According to a Jan. 26 letter the commission sent to the assessment board, permitting development before the completion of a land use plan “may impact the commission’s ability to develop recommendations for the appropriate use of land, water and other renewable and non-renewable resources within the planning region.” Sue Thomas, a spokesperson for Yukon’s Department of Energy, Mines and Resources, told The Narwhal in an email land use planning doesn’t negate tenure holders’ ability to develop their mineral claims. “Development and/or exploration projects, like any other industrial and non-industrial uses, are allowed to continue while the planning process is underway,” she said. Allowing industry to explore in a region where land use planning is underway could rule out protecting areas with high conservation values, Sebastian Jones, wildlife and habitat analyst at the Yukon Conservation Society, told The Narwhal. “It’s no secret that if projects like this can get permitted before the land use plan is in place, it will [predetermine] land use planning,” he said, adding that projects like Antimony Creek are designed to eventually result in a large mine. Jones said miners likely recognize their days are numbered to develop claims in sensitive areas, which explains why they appear to be racing to get permits before land use plans are completed. “It’s very likely that developing a mine will not be one of the approved activities in the project area,” he said. If mineral deposits are located, several mines could crop up, leading to cumulative impacts on an otherwise undisturbed area, Jones said. In a Jan. 8 letter to the assessment board, the Yukon Conservation Society recommended the project not proceed, saying access roads and the eventual building and operation of mines would cause cumulative impacts on the region. The Antimony Creek project area is in a region that’s of very high cultural value to Tr’ondëk Hwëch’in citizens, according to the First Nation’s letter. The region, known as the “cultural integrity area,” which contains roughly 88 per cent of the Tr’ondëk Hwëch’in’s settlement land, provides critical habitat for caribou, moose, sheep and salmon. It is also home to mineral licks, rare plants and old-growth forests, all of which help sustain wildlife and, in turn, Tr’ondëk Hwëch’in harvesters. “The whole ecosystem contributes to our lifestyle and our culture,” Chief Roberta Joseph told The Narwhal. “It’s not only about food value — it’s about ensuring our connection and our spirituality with the land, it’s about bonding and passing on traditional teachings through stories and teaching about harvesting.” There are also significant heritage sites in the area. The project is located about 300 metres away from a settlement land parcel that was originally selected to protect traditional gravesites, according to the letter. The letter suggests there are likely even more burial sites, as not all heritage areas have been mapped by the First Nation. “It is concerning that there could be potential impacts on our ancestors who may have been buried in the area near the proposed application,” Joseph said. “There needs to be regard and consideration on the burials of our ancestors, wherever they’re buried throughout our traditional territory.” “It’s just a matter of ensuring that our heritage as First Nations people of this land, since millennia, is being respected in accordance to our final agreements and the spirit and intent of our final agreements.” The area is considered so important to Tr’ondëk Hwëch’in citizens because it has yet to be disturbed by industry, the letter states. “Until a land use plan is in place that takes into account Tr’ondëk Hwëch’in rights under the final agreement, the cultural integrity area must remain intact in order for land and wildlife to thrive and for traditional pursuits to continue,” the letter states. Staking should be off-limits in the Dawson region until a land use plan is in place, according to a Jan. 20 letter Na-Cho Nyäk Dun sent to the assessment board. The letter said completion of the plan is “an essential prerequisite of any further permitting in this area.” Chief Simon Mervyn didn’t reply to a return for comment. According to the letter, land use planning helps facilitate development because it provides certainty “for all.” “It will allow for Na-Cho Nyäk Dun, other Indigenous nations, public government and industry to make decisions together respecting priorities, values and criteria for development and minimize future land use conflicts by making clear where development can and cannot be pursued,” the letter states. “Most importantly, it will ensure that development respects and supports, rather than undermines, the Treaty Rights of Na-Cho Nyäk Dun.” Former vice-chair of the Dawson land use planning commission Art Webster also recently called for a halt on staking in the Dawson area. “By allowing the staking of mineral claims, it basically sends out a message saying, ‘This is the highest value of this land, the extraction of minerals’ … at the expense of considering any other values for that land,” Art Webster told The Narwhal in an interview. According to Na-Cho Nyäk Dun’s letter, the First Nation has been waiting for a completed land use plan in its traditional territory since it signed its final agreement 25 years ago. This would be separate from the Dawson land use plan. While Na-Cho Nyäk Dun is not an official party to the land use planning process in the Dawson region, it has observer status, as its territory overlaps with that of the Tr’ondëk Hwëch’in. The nations have an agreement in place to settle possible disputes linked to overlapping traditional territories. “In the view of Na-Cho Nyäk Dun, public government’s failure to initiate a land use planning process for the Na-Cho Nyäk Dun traditional territory is a fundamental breach of a key commitment enshrined in our treaty, and is flatly inconsistent with the honour of the Crown,” the letter states. The Antimony Creek project is only one mining application on Tr’ondëk Hwëch’in’s traditional territory, Joseph said. “There are many of them every year,” she said. A similar quartz exploration project, called Coal Creek (Monster) located roughly 85 kilometres north of Dawson City is making its way through the environmental assessment process. The Vancouver-based proponent, Go Metals, is searching for battery metals such as copper, gold and silver, according to the project proposal. According to a letter Tr’ondëk Hwëch’in sent to the assessment board, the First Nation continues “to strongly oppose” any development in the northern reaches of its traditional territory, which is relatively intact and undisturbed wilderness. Go Metals spokesperson, Scott Sheldon, told The Narwhal in an email, “We’re committed to continuing our conversations with local First Nations and we look forward to progress being made by the Dawson Regional Planning Commission to help us create better exploration plans for our battery metals project.” The Coffee Gold project, a proposed hard rock mine in a remote corner of Yukon, is also on the traditional territories of Na-Cho Nyäk Dun and Tr’ondëk Hwëch’in. Yukoners can submit feedback on that project until March 26. If this proposal is approved, the mine would be the largest in Yukon’s history. Julien Gignac, Local Journalism Initiative Reporter, The Narwhal

Let’s block ads! (Why?)

Source link

Continue Reading


Little Foot fossil scan sheds light on human origins –



Sophisticated scanning technology is revealing intriguing secrets about Little Foot, the remarkable fossil of an early human forerunner that inhabited South Africa 3.67 million years ago during a critical juncture in our evolutionary history.

Scientists said on Tuesday they examined key parts of the nearly complete and well-preserved fossil at Britain’s national synchrotron facility, Diamond Light Source. The scanning focused upon Little Foot’s cranial vault — the upper part of her braincase — and her lower jaw, or mandible.

The researchers gained insight not only into the biology of Little Foot’s species but also into the hardships that this individual, an adult female, encountered during her life.

Little Foot’s species blended ape-like and human-like traits and is considered a possible direct ancestor of humans. University of the Witwatersrand paleoanthropologist Ron Clarke, who unearthed the fossil in the 1990s in the Sterkfontein Caves northwest of Johannesburg and is a co-author of the new study, has identified the species as Australopithecus prometheus.

High-resolution imaging of the skull was carried out at at the U.K.’s national synchrotron science facility Diamond Light Source in Oxford. (Diamond Light Source Ltd. via Reuters)

“In the cranial vault, we could identify the vascular canals in the spongious bone that are probably involved in brain thermoregulation — how the brain cools down,” said University of Cambridge paleoanthropologist Amélie Beaudet, who led the study published in the journal e-Life.

“This is very interesting as we did not have much information about that system,” Beaudet added, noting that it likely played a key role in the threefold brain size increase from Australopithecus to modern humans.

Little Foot lived in a tropical forested area, “and for some reason, she fell into the cave,” said Clarke.

Beaudet told the BBC that it’s believed Little Foot fell through an opening in the floor of the cave where she was found.

Teeth ‘quite worn’

Little Foot’s teeth also were revealing.

“The dental tissues are really well preserved. She was relatively old since her teeth are quite worn,” Beaudet said, though Little Foot’s precise age has not yet been determined.

The researchers spotted defects in the tooth enamel indicative of two childhood bouts of physiological stress such as disease or malnutrition.

“There is still a lot to learn about early hominin biology,” said study co-author Thomas Connolley, principal beamline scientist at Diamond, using a term encompassing modern humans and certain extinct members of the human evolutionary lineage. “Synchrotron X-ray imaging enables examination of fossil specimens in a similar way to a hospital X-ray CT-scan of a patient, but in much greater detail.”

The skeleton of Little Foot is seen in Sterkfontein, South Africa in this undated handout photo. Researchers brought the complete skull of the skeleton from South Africa to the U.K. in June 2019 for further study. (R.J. Clark via Reuters)

Little Foot, whose moniker reflects the small foot bones that were among the first elements of the skeleton found, stood roughly 4-foot-3-inches (130 centimetres) tall. Little Foot has been compared in importance to the fossil called Lucy that is about 3.2 million years old and less complete.

Both are species of the genus Australopithecus but possessed different biological traits, just as modern humans and Neanderthals are species of the same genus – Homo – but had different characteristics. Lucy’s species is called Australopithecus afarensis.

“Australopithecus could be the direct ancestor of Homo – humans – and we really need to learn more about the different species of Australopithecus to be able to decide which one would be the best candidate to be our direct ancestor,” Beaudet said.

Our own species, Homo sapiens, first appeared roughly 300,000 years ago.

The synchrotron findings build on previous research on Little Foot.

The species was able to walk fully upright, but had traits suggesting it also still climbed trees, perhaps sleeping there to avoid large predators. It had gorilla-like facial features and powerful hands for climbing. Its legs were longer than its arms, as in modern humans, making this the most-ancient hominin definitively known to have that trait.

“All previous Australopithecus skeletal remains have been partial and fragmentary,” Clarke said.

Let’s block ads! (Why?)

Source link

Continue Reading


Rare 'locked' letter sealed 300 years ago is finally opened virtually – CTV News



Three hundred years ago, before envelopes, passwords and security codes, writers often struggled to keep thoughts, cares and dreams expressed in their letters private.

One popular way was to use a technique called letter locking — intricately folding a flat sheet of paper to become its own envelope. This security strategy presented a challenge when 577 locked letters delivered to The Hague in the Netherlands between 1689 and 1706 were found in a trunk of undelivered mail.

The letters had never reached their final recipients, and conservationists didn’t want to open and damage them. Instead, a team has found a way to read one of the letters without breaking its seal or unfolding it in any way. Using a highly sensitive X-ray scanner and computer algorithms, researchers virtually unfolded the unopened letter.

“This algorithm takes us right into the heart of a locked letter,” the research team said in a statement.

“Sometimes the past resists scrutiny. We could simply have cut these letters open, but instead we took the time to study them for their hidden, secret, and inaccessible qualities. We’ve learned that letters can be a lot more revealing when they are left unopened.”

The technique revealed the contents of a letter dated July 31, 1697. It contains a request from Jacques Sennacques to his cousin Pierre Le Pers, a French merchant in The Hague, for a certified copy of a death notice of Daniel Le Pers.

The details may seem prosaic, but the researchers said the letter gives fascinating insight into the lives of ordinary people — a snapshot of the early modern world as it went about its business.

The trunk of correspondence belonged to a postmaster called Simon de Brienne and his wife, postmistress Marie Germain. It was acquired by the Museum voor Communicatie in The Hague in 1926.

In addition to the unopened letters, it contains 2,571 opened letters and fragments that for one reason or another never reached their destination.

At that time, there was no such thing as a postage stamp and recipients, not senders, were responsible for the postal and delivery charges. If the recipient was deceased or rejected the letter, no fees could be collected and the letters weren’t delivered.


The X-ray scanners were originally designed to map the mineral content of teeth and have been used in dental research — until now.

“We’ve been able to use our scanners to X-ray history,” said study author David Mills, a researcher at Queen Mary University of London, in a statement.

“The scanning technology is similar to medical CT scanners, but using much more intense X-rays which allow us to see the minute traces of metal in the ink used to write these letters. The rest of the team were then able to take our scan images and turn them into letters they could open virtually and read for the first time in over 300 years.”

The new technique has the potential to unlock new historical evidence from the Brienne trunk and other collections of unopened letters and documents, the study said.

One tantalizing application could be to virtually unfold sealed items and letters in the Prize Papers — an archive of documents confiscated by the British from enemy ships between the 17th and 19th centuries.

“Using virtual unfolding to read an intimate story that has never seen the light of day — and never even reached its recipient — is truly extraordinary,” the researchers said in the statement.

The research was published in the journal Nature Communications on Tuesday.

Let’s block ads! (Why?)

Source link

Continue Reading