A dolmen is a type of single-chamber megalithic tomb, usually consisting of two or more vertical megaliths supporting a large flat horizontal capstone or “table”. Most date from the early Neolithic (4000–3000 BC) and were sometimes covered with earth or smaller stones to form a tumulus. Small pad stones may be wedged between the cap and supporting stones to achieve a level appearance. In many instances, the covering has weathered away, leaving only the stone “skeleton” of the mound intact.
It remains unclear when, why, and by whom the earliest dolmens were made. The oldest known are found in Western Europe, dating from c 7,000 years ago. Archaeologists still do not know who erected these dolmens, which makes it difficult to know why they did it. They are generally all regarded as tombs or burial chambers, despite the absence of clear evidence for this. Human remains, sometimes accompanied by artifacts, have been found in or close to the dolmens which could be scientifically dated using radiocarbon dating. However, it has been impossible to prove that these remains date from the time when the stones were originally set in place. Wikipedia
Wanting to understand how Einstein learned physics may, at first, seem as pointless as trying to fly by watching birds and flapping your arms really hard. How do you emulate someone who is synonymous with genius?
However, I think the investigation can still bear fruits, even if you or I might not have the intellectual gifts to revolutionize physics. Whatever Einstein did to learn, he clearly did something right, so there’s merit in trying to figure out what that was.
How Smart Was Einstein? (Did He Really Fail Elementary Mathematics?)
One of the most common stories about Einstein is that he failed grade school math. I think this is one of those ideas that sounds so good it has to get repeated, regardless of whether it is true or not.
Unfortunately, it’s not true. Einstein was a strong math student from a very young age. He himself admits:
“I never failed in mathematics. Before I was fifteen I had mastered differential and integral calculus.”
Four years ago, organizers created the international AI City Challenge to spur the development of artificial intelligence for real-world scenarios like counting cars traveling through intersections or spotting accidents on freeways.
In the first years, teams representing American companies or universities took top spots in the competition. Last year, Chinese companies won three out of four competitions.
Last week, Chinese tech giants Alibaba and Baidu swept the AI City Challenge, beating competitors from nearly 40 nations. Chinese companies or universities took first and second place in all five categories. TikTok creator ByteDance took second place in a competition to identify car accidents or stalled vehicles from freeway video feeds.
The results reflect years of investment by the Chinese government in smart cities. Hundreds of Chinese cities have pilot programs, and by some estimates, China has half of the world’s smart cities. The spread of edge computing, cameras, and sensors using 5G wireless connections is expected to accelerate use of smart-city and surveillance technology.
During last weekend’s deadly heatwave, some roads in the Pacific Northwest buckled. Workers ventured out in blistering conditions to put cracked concrete and asphalt byways back together. Steel drawbridges were doused with water to make sure they wouldn’t swell shut under the oppressive heat.
The heat dome that sat over the region provided a brutal stress test of its roadways, some of which couldn’t withstand multiple days of record-breaking temperatures. It’s something that’s happened before, in Washington, Wisconsin, South Dakota, and anywhere else experiencing extreme heat waves.
“You can design something to work in a very hot temperature or not. That’s not the problem.” Steve Muench, a professor of civil engineering at the University of Washington says. The problem is that the current heat defies engineering expectations. Fixing that bigger problem will take engineering, planning, and a whole lot of public willpower.
Why can’t these roads handle the heat?
Different kinds of roads behave very differently under heat. In the US, roads are typically made of one of two materials — asphalt or concrete.
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A road that buckled in the recent heat.Washington State Department of Transportation North via Twitter
You’ve probably heard that the coronavirus pandemic triggered a worldwide mental-health crisis. This narrative took hold almost as quickly as the virus itself. In the spring of 2020, article after article—even an op-ed by one of us—warned of a looming psychological epidemic. As clinical scientists and research psychologists have pointed out, the coronavirus pandemic has created many conditions that might lead to psychological distress: sudden, widespread disruptions to people’s livelihoods and social connections; millions bereaved; and the most vulnerable subjected to long-lasting hardship. A global collapse in well-being has seemed inevitable.
We joined a mental-health task force, commissioned by The Lancet, in order to quantify the pandemic’s psychological effects. When we reviewed the best available data, we saw that some groups—including people facing financial stress—have experienced substantial, life-changing suffering. However, looking at the global population on the whole, we were surprised not to find the prolonged misery we had expected.
We combed through close to 1,000 studies that examined hundreds of thousands of people from nearly 100 countries. This research measured many variables related to mental health—including anxiety, depression, and deaths by suicide—as well as life satisfaction. We focused on two complementary types of evidence: surveys that examined comparable groups of people before and during the pandemic and studies tracking the same individuals over time. Neither type of study is perfect, but when the same conclusions emerged from both sets of evidence, we gained confidence that we were seeing something real.
Tokyo, officially the Tokyo Metropolis, is the de facto capital and most populous prefecture of Japan. Located at the head of Tokyo Bay, the prefecture forms part of the Kantō region on the central Pacific coast of Japan’s main island of Honshu. Tokyo is the political and economic center of the country, as well as the seat of the Emperor of Japan and the national government. As of 2021, the prefecture has an estimated population of 13,960,236. The Greater Tokyo Area is the most populous metropolitan area in the world, with more than 37.393 million residents as of 2020.
Originally a fishing village, named Edo, the city became a prominent political center in 1603, when it became the seat of the Tokugawa shogunate. By the mid-18th century, Edo was one of the most populous cities in the world at over one million. Following the end of the shogunate in 1868, the imperial capital in Kyoto was moved to the city, which was renamed Tokyo (literally “eastern capital”). Tokyo was devastated by the 1923 Great Kantō earthquake, and again by Allied bombing raids during World War II. Beginning in the 1950s, the city underwent rapid reconstruction and expansion, going on to lead Japan’s post-war economic recovery. Since 1943, the Tokyo Metropolitan Government has administered the prefecture’s 23 special wards (formerly Tokyo City), various bed towns in the western area, and two outlying island chains. Wikipedia
When I think of walking for cardio, I picture Jane Fonda-vibes outfits (hello, brightly-colored, high-cut Spandex and sweatbands), wrist and ankle weights, and wildly pumping arms. And then I shrug it off. I mean, cardio has to be high-exertion and super sweaty, right? Or is walking cardio after all?
First, let me clarify: Cardio—short for “cardiorespiratory” activity—refers to physical activity that relies on your circulatory and respiratory systems to supply oxygen to your working muscles, explains Steve Stonehouse, CPT, director of education for the running studio STRIDE. (You’ve also heard it referred to as “aerobic exercise.”)
Any low- to moderate-intensity exercise is considered aerobic, which means you don’t have to go all-out to get a good cardio workout. In fact, you can reap the benefits without maxing out your muscles at all.
Withdrawing my hands reluctantly from the slowly spinning bowl, I watched its uneven sides slowly come to a stop, wishing I could straighten them out just a little more. I was in the ancient pottery town of Hagi in rural Yamaguchi, Japan, and while I trusted the potter who convinced me to let it be, I can’t say I understood his motives.
Smiling, he announced, “it has wabi-sabi” – and whisked the bowl away for firing. I sat, contemplating the lack of symmetry and wondering what on Earth he meant.
As it turns out, failing to understand this phrase is not unusual. A key part of the Japanese Aesthetic – the ancient ideals that still govern the norms on taste and beauty in Japan – wabi-sabi is not only untranslatable but also considered undefinable in Japanese culture. Often muttered in moments of profound appreciation, and almost always followed by the word muri! (impossible!) when asked to expand, the phrase offers an unusual way to view the world.
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The appreciation of transient beauty is at the heart of some of Japan’s most simple pleasures, such as the annual celebration of cherry blossoms. Credit: Alex Ramsay/Alamy.
Film and Writing Festival for Comedy. Showcasing best of comedy short films at the FEEDBACK Film Festival. Plus, showcasing best of comedy novels, short stories, poems, screenplays (TV, short, feature) at the festival performed by professional actors.
An image from Dolmens In Cornwall
Einstein
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The Atlantic
James' World 2 