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10 Feb 2025 - 06:35 am

A brief history of sunglasses, from Ancient Rome to Hollywood
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Sunglasses, or dark glasses, have always guarded against strong sunlight, but is there more to “shades” than we think?

The pupils of our eyes are delicate and react immediately to strong lights. Protecting them against light — even the brilliance reflected off snow — is important for everyone. Himalayan mountaineers wear goggles for this exact purpose.

Protection is partly the function of sunglasses. But dark or colored lens glasses have become fashion accessories and personal signature items. Think of the vast and famous collector of sunglasses Elton John, with his pink lensed heart-shaped extravaganzas and many others.

When did this interest in protecting the eyes begin, and at what point did dark glasses become a social statement as well as physical protection?
The Roman Emperor Nero is reported as holding polished gemstones to his eyes for sun protection as he watched fighting gladiators.

We know Canadian far north Copper Inuit and Alaskan Yupik wore snow goggles of many kinds made of antlers or whalebone and with tiny horizontal slits. Wearers looked through these and they were protected against the snow’s brilliant light when hunting. At the same time the very narrow eye holes helped them to focus on their prey.

In 12th-century China, judges wore sunglasses with smoked quartz lenses to hide their facial expressions — perhaps to retain their dignity or not convey emotions.

Williamtem

10 Feb 2025 - 04:58 am

These apes can tell when humans don’t know something, study finds
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Some great apes realize when a human partner doesn’t know something and are capable of communicating information to them to change their behavior, a new study shows.

Researchers from Johns Hopkins University studying bonobos found that they would point to where treats were hidden if they could see their human partner didn’t know where they were, according to a statement from the university, published Monday.

Working with three male bonobos, study co-author Luke Townrow, a Johns Hopkins PhD student, would sit across a table from one of the animals as another person placed a treat under one of three cups.
In some cases, Townrow would be allowed to see which cup the treat was under, and the bonobo would wait for him to pass it the food.

At other times, he would not be able to see where the treat was, and the bonobo would point to the right cup to help him find the food.

The “seemingly simple experiment that demonstrated for the first time that apes will communicate unknown information in the name of teamwork,” the statement reads.

And study co-author Chris Krupenye, a Johns Hopkins assistant professor of psychological and brain sciences, told CNN that the study “is one of the clearest pieces of evidence that a non-human primate understands when someone else is ignorant.”

This ability to intuit gaps in others’ knowledge is known as theory of mind.

“As humans we have theory of mind, the ability to think about others’ perspectives,” Krupenye told CNN on Tuesday.

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10 Feb 2025 - 03:37 am

A brief history of sunglasses, from Ancient Rome to Hollywood
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Sunglasses, or dark glasses, have always guarded against strong sunlight, but is there more to “shades” than we think?

The pupils of our eyes are delicate and react immediately to strong lights. Protecting them against light — even the brilliance reflected off snow — is important for everyone. Himalayan mountaineers wear goggles for this exact purpose.

Protection is partly the function of sunglasses. But dark or colored lens glasses have become fashion accessories and personal signature items. Think of the vast and famous collector of sunglasses Elton John, with his pink lensed heart-shaped extravaganzas and many others.

When did this interest in protecting the eyes begin, and at what point did dark glasses become a social statement as well as physical protection?
The Roman Emperor Nero is reported as holding polished gemstones to his eyes for sun protection as he watched fighting gladiators.

We know Canadian far north Copper Inuit and Alaskan Yupik wore snow goggles of many kinds made of antlers or whalebone and with tiny horizontal slits. Wearers looked through these and they were protected against the snow’s brilliant light when hunting. At the same time the very narrow eye holes helped them to focus on their prey.

In 12th-century China, judges wore sunglasses with smoked quartz lenses to hide their facial expressions — perhaps to retain their dignity or not convey emotions.

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