from the world's big
New space dangers found by NASA in astronaut blood
A study found alarming changes in the bodies of astronauts aboard the International Space Station.
- A NASA study reveals new dangers to the human body in space.
- The absence of gravity caused changes in people's blood flows.
- Some had blood going in reverse while others developed clots.
Humanity's expansion into space is both a hopeful and risky endeavor. A new study from NASA identified a new danger – low gravity can make blood flow stop and actually go in reverse in some astronauts.
The condition particularly applied to people's upper bodies. What its implications are for long-term health is still being studied but it appears to join the other space afflictions that we already know about, which include loss of mass and increased brittleness of bones.
The study arrived at this conclusion by looking at data from 11 astronauts (nine men, two women) who spent an average of six months each on the International Space Station.
Ultrasound assessments revealed that by around the 50th day into the mission, seven members of the crew had blood in their internal jugular vein stop flowing or even start going in reverse. This vein is a major blood vessel going down the side of the neck. Its function is to collect blood from the brain, neck and face.
One of the astronauts also developed a clot in the vein while still in flight, while another was found to have a partial clot upon coming back to Earth.
Having your blood flow in reverse definitely doesn't sound appealing and the discovery raises additional alarms about the dangers of long-term space travel.
Michael Stenger, the study's senior author, also a manager of the Cardiovascular and Vision Laboratory at NASA's Johnson Space Center in Houston, called the finding "unexpected".
"We did not expect to see stasis and reverse flow," told Stenger to NBC News. "That is very abnormal. On Earth, you would immediately suspect a massive blockage or a tumor or something like that."
Stenger attributes the issue to the absence of gravity, pointing to years worth of observations of physiological changes in astronauts.
"This is why some astronauts get puffy faces, because there's no gravity to pull down those fluids circulating in the upper body," explained Stenger. "You'll sometimes also see veins popping out in the neck, or in the head — which you can see with bald astronauts, in particular."
He pointed to stopped blood flow as probably the most worrisome aspect of the discovery, saying that this results in dangerous blood clots.
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While the research is concerning, it can be seen more as an opportunity to anticipate the risks and develop new treatments, say the scientists.
Check out the study "Assessment of Jugular Venous Blood Flow Stasis and Thrombosis During Spaceflight" In the medical journal Jama Network Open (from the American Medical Association).
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Construction of the $500 billion dollar tech city-state of the future is moving ahead.
- The futuristic megacity Neom is being built in Saudi Arabia.
- The city will be fully automated, leading in health, education and quality of life.
- It will feature an artificial moon, cloud seeding, robotic gladiators and flying taxis.
The Red Sea area where Neom will be built:
Saudi Arabia Plans Futuristic City, "Neom" (Full Promotional Video)<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="c646d528d230c1bf66c75422bc4ccf6f"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/N53DzL3_BHA?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Frequent shopping for single items adds to our carbon footprint.
- A new study shows e-commerce sites like Amazon leave larger greenhouse gas footprints than retail stores.
- Ordering online from retail stores has an even smaller footprint than going to the store yourself.
- Greening efforts by major e-commerce sites won't curb wasteful consumer habits. Consolidating online orders can make a difference.
A pile of recycled cardboard sits on the ground at Recology's Recycle Central on January 4, 2018 in San Francisco, California.
Photo by Justin Sullivan/Getty Images<p>A large part of the reason is speed. In a competitive market, pure players use the equation, <em>speed + convenience</em>, to drive adoption. This is especially relevant to the "last mile" GHG footprint: the distance between the distribution center and the consumer.</p><p>Interestingly, the smallest GHG footprint occurs when you order directly from a physical store—even smaller than going there yourself. Pure players, such as Amazon, are the greatest offenders. Variables like geographic location matter; the team looked at shopping in the UK, the US, China, and the Netherlands. </p><p>Sadegh Shahmohammadi, a PhD student at the Netherlands' Radboud University and corresponding author of the paper, <a href="https://www.cnn.com/2020/02/26/tech/greenhouse-gas-emissions-retail/index.html" target="_blank">says</a> the above "pattern holds true in countries where people mostly drive. It really depends on the country and consumer behavior there."</p><p>The researchers write that this year-and-a-half long study pushes back on previous research that claims online shopping to be better in terms of GHG footprints.</p><p style="margin-left: 20px;">"They have, however, compared the GHG emissions per shopping event and did not consider the link between the retail channels and the basket size, which leads to a different conclusion than that of the current study."</p><p>Online retail is where convenience trumps environment: people tend to order one item at a time when shopping on pure player sites, whereas they stock up on multiple items when visiting a store. Consumers will sometimes order a number of separate items over the course of a week rather than making one trip to purchase everything they need. </p><p>While greening efforts by online retailers are important, until a shift in consumer attitude changes, the current carbon footprint will be a hard obstacle to overcome. Amazon is trying to have it both ways—carbon-free and convenience addicted—and the math isn't adding up. If you need to order things, do it online, but try to consolidate your purchases as much as possible.</p><p>--</p><p><em>Stay in touch with Derek on <a href="http://www.twitter.com/derekberes" target="_blank">Twitter</a>, <a href="https://www.facebook.com/DerekBeresdotcom" target="_blank">Facebook</a> and <a href="https://derekberes.substack.com/" target="_blank">Substack</a>. His next book is</em> "<em>Hero's Dose: The Case For Psychedelics in Ritual and Therapy."</em></p>
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