Scientists Are Devising Clever Solutions to Feed Astronauts on Mars Space Flights
Astronaut and Expedition 64 Flight Engineer Soichi Noguchi of the Japan Aerospace Exploration Agency displays Extra Dwarf Pak Choi plants growing aboard the International Space Station. The plants were grown for the Veggie study which is exploring space agriculture as a way to sustain astronauts on future missions to the Moon or Mars.
Astronauts at the International Space Station today depend on pre-packaged, freeze-dried food, plus some fresh produce thanks to regular resupply missions. This supply chain, however, will not be available on trips further out, such as the moon or Mars. So what are astronauts on long missions going to eat?
Going by the options available now, says Christel Paille, an engineer at the European Space Agency, a lunar expedition is likely to have only dehydrated foods. “So no more fresh product, and a limited amount of already hydrated product in cans.”
For the Mars mission, the situation is a bit more complex, she says. Prepackaged food could still constitute most of their food, “but combined with [on site] production of certain food products…to get them fresh.” A Mars mission isn’t right around the corner, but scientists are currently working on solutions for how to feed those astronauts. A number of boundary-pushing efforts are now underway.
The logistics of growing plants in space, of course, are very different from Earth. There is no gravity, sunlight, or atmosphere. High levels of ionizing radiation stunt plant growth. Plus, plants take up a lot of space, something that is, ironically, at a premium up there. These and special nutritional requirements of spacefarers have given scientists some specific and challenging problems.
To study fresh food production systems, NASA runs the Vegetable Production System (Veggie) on the ISS. Deployed in 2014, Veggie has been growing salad-type plants on “plant pillows” filled with growth media, including a special clay and controlled-release fertilizer, and a passive wicking watering system. They have had some success growing leafy greens and even flowers.
"Ideally, we would like a system which has zero waste and, therefore, needs zero input, zero additional resources."
A larger farming facility run by NASA on the ISS is the Advanced Plant Habitat to study how plants grow in space. This fully-automated, closed-loop system has an environmentally controlled growth chamber and is equipped with sensors that relay real-time information about temperature, oxygen content, and moisture levels back to the ground team at Kennedy Space Center in Florida. In December 2020, the ISS crew feasted on radishes grown in the APH.
“But salad doesn’t give you any calories,” says Erik Seedhouse, a researcher at the Applied Aviation Sciences Department at Embry-Riddle Aeronautical University in Florida. “It gives you some minerals, but it doesn’t give you a lot of carbohydrates.” Seedhouse also noted in his 2020 book Life Support Systems for Humans in Space: “Integrating the growing of plants into a life support system is a fiendishly difficult enterprise.” As a case point, he referred to the ESA’s Micro-Ecological Life Support System Alternative (MELiSSA) program that has been running since 1989 to integrate growing of plants in a closed life support system such as a spacecraft.
Paille, one of the scientists running MELiSSA, says that the system aims to recycle the metabolic waste produced by crew members back into the metabolic resources required by them: “The aim is…to come [up with] a closed, sustainable system which does not [need] any logistics resupply.” MELiSSA uses microorganisms to process human excretions in order to harvest carbon dioxide and nitrate to grow plants. “Ideally, we would like a system which has zero waste and, therefore, needs zero input, zero additional resources,” Paille adds.
Microorganisms play a big role as “fuel” in food production in extreme places, including in space. Last year, researchers discovered Methylobacterium strains on the ISS, including some never-seen-before species. Kasthuri Venkateswaran of NASA’s Jet Propulsion Laboratory, one of the researchers involved in the study, says, “[The] isolation of novel microbes that help to promote the plant growth under stressful conditions is very essential… Certain bacteria can decompose complex matter into a simple nutrient [that] the plants can absorb.” These microbes, which have already adapted to space conditions—such as the absence of gravity and increased radiation—boost various plant growth processes and help withstand the harsh physical environment.
MELiSSA, says Paille, has demonstrated that it is possible to grow plants in space. “This is important information because…we didn’t know whether the space environment was affecting the biological cycle of the plant…[and of] cyanobacteria.” With the scientific and engineering aspects of a closed, self-sustaining life support system becoming clearer, she says, the next stage is to find out if it works in space. They plan to run tests recycling human urine into useful components, including those that promote plant growth.
The MELiSSA pilot plant uses rats currently, and needs to be translated for human subjects for further studies. “Demonstrating the process and well-being of a rat in terms of providing water, sufficient oxygen, and recycling sufficient carbon dioxide, in a non-stressful manner, is one thing,” Paille says, “but then, having a human in the loop [means] you also need to integrate user interfaces from the operational point of view.”
Growing food in space comes with an additional caveat that underscores its high stakes. Barbara Demmig-Adams from the Department of Ecology and Evolutionary Biology at the University of Colorado Boulder explains, “There are conditions that actually will hurt your health more than just living here on earth. And so the need for nutritious food and micronutrients is even greater for an astronaut than for [you and] me.”
Demmig-Adams, who has worked on increasing the nutritional quality of plants for long-duration spaceflight missions, also adds that there is no need to reinvent the wheel. Her work has focused on duckweed, a rather unappealingly named aquatic plant. “It is 100 percent edible, grows very fast, it’s very small, and like some other floating aquatic plants, also produces a lot of protein,” she says. “And here on Earth, studies have shown that the amount of protein you get from the same area of these floating aquatic plants is 20 times higher compared to soybeans.”
Aquatic plants also tend to grow well in microgravity: “Plants that float on water, they don’t respond to gravity, they just hug the water film… They don’t need to know what’s up and what’s down.” On top of that, she adds, “They also produce higher concentrations of really important micronutrients, antioxidants that humans need, especially under space radiation.” In fact, duckweed, when subjected to high amounts of radiation, makes nutrients called carotenoids that are crucial for fighting radiation damage. “We’ve looked at dozens and dozens of plants, and the duckweed makes more of this radiation fighter…than anything I’ve seen before.”
Despite all the scientific advances and promising leads, no one really knows what the conditions so far out in space will be and what new challenges they will bring. As Paille says, “There are known unknowns and unknown unknowns.”
One definite “known” for astronauts is that growing their food is the ideal scenario for space travel in the long term since “[taking] all your food along with you, for best part of two years, that’s a lot of space and a lot of weight,” as Seedhouse says. That said, once they land on Mars, they’d have to think about what to eat all over again. “Then you probably want to start building a greenhouse and growing food there [as well],” he adds.
And that is a whole different challenge altogether.
Individuals seeking funding for experimental therapies may enroll in legitimate clinical trials -- or fall prey to snake oil.
Nearly a decade ago, Jamie Anderson hit his highest weight ever: 618 pounds. Depression drove him to eat and eat. He tried all kinds of diets, losing and regaining weight again and again. Then, four years ago, a friend nudged him to join a gym, and with a trainer's guidance, he embarked on a life-altering path.
Ethicists become particularly alarmed when medical crowdfunding appeals are for scientifically unfounded and potentially harmful interventions.
"The big catalyst for all of this is, I was diagnosed as a diabetic," says Anderson, a 46-year-old sales associate in the auto care department at Walmart. Within three years, he was down to 276 pounds but left with excess skin, which sagged from his belly to his mid-thighs.
Plastic surgery would cost $4,000 more than the sum his health insurance approved. That's when Anderson, who lives in Cabot, Arkansas, a suburb outside of Little Rock, turned to online crowdfunding to raise money. In a few months last year, current and former co-workers and friends of friends came up with that amount, covering the remaining expenses for the tummy tuck and overnight hospital stay.
The crowdfunding site that he used, CoFund Health, aimed to give his donors some peace of mind about where their money was going. Unlike GoFundMe and other platforms that don't restrict how donations are spent, Anderson's funds were loaded on a debit card that only worked at health care providers, so the donors "were assured that it was for medical bills only," he says.
CoFund Health was started in January 2019 in response to concerns about the legitimacy of many medical crowdfunding campaigns. As crowdfunding for health-related expenses has gained more traction on social media sites, with countless campaigns seeking to subsidize the high costs of care, it has given rise to some questionable transactions and legitimate ethical concerns.
Common examples of alleged fraud have involved misusing the donations for nonmedical purposes, feigning or embellishing the story of one's own unfortunate plight or that of another person, or impersonating someone else with an illness. Ethicists become particularly alarmed when medical crowdfunding appeals are for scientifically unfounded and potentially harmful interventions.
About 20 percent of American adults reported giving to a crowdfunding campaign for medical bills or treatments, according to a survey by AmeriSpeak Spotlight on Health from NORC, formerly called the National Opinion Research Center, a non-partisan research institution at the University of Chicago. The self-funded poll, conducted in November 2019, included 1,020 interviews with a representative sample of U.S. households. Researchers cited a 2019 City University of New York-Harvard study, which noted that medical bills are the most common basis for declaring personal bankruptcy.
Some experts contend that crowdfunding platforms should serve as gatekeepers in prohibiting campaigns for unproven treatments. Facing a dire diagnosis, individuals may go out on a limb to try anything and everything to prolong and improve the quality of their lives.
They may enroll in well-designed clinical trials, or they could fall prey "to snake oil being sold by people out there just making a buck," says Jeremy Snyder, a health sciences professor at Simon Fraser University in British Columbia, Canada, and the lead author of a December 2019 article in The Hastings Report about crowdfunding for dubious treatments.
For instance, crowdfunding campaigns have sought donations for homeopathic healing for cancer, unapproved stem cell therapy for central nervous system injury, and extended antibiotic use for chronic Lyme disease, according to an October 2018 report in the Journal of the American Medical Association.
Ford Vox, the lead author and an Atlanta-based physician specializing in brain injury, maintains that a repository should exist to monitor the outcomes of experimental treatments. "At the very least, there ought to be some tracking of what happens to the people the funds are being raised for," he says. "It would be great for an independent organization to do so."
"Even if it appears like a good cause, consumers should still do some research before donating to a crowdfunding campaign."
The Federal Trade Commission, the national consumer watchdog, cautions online that "it might be impossible for you to know if the cause is real and if the money actually gets to the intended recipient." Another caveat: Donors can't deduct contributions to individuals on tax returns.
"Even if it appears like a good cause, consumers should still do some research before donating to a crowdfunding campaign," says Malini Mithal, associate director of financial practices at the FTC. "Don't assume all medical treatments are tested and safe."
Before making any donation, it would be wise to check whether a crowdfunding site offers some sort of guarantee if a campaign ends up being fraudulent, says Kristin Judge, chief executive and founder of the Cybercrime Support Network, a Michigan-based nonprofit that serves victims before, during, and after an incident. They should know how the campaign organizer is related to the intended recipient and note whether any direct family members and friends have given funds and left supportive comments.
Donating to vetted charities offers more assurance than crowdfunding that the money will be channeled toward helping someone in need, says Daniel Billingsley, vice president of external affairs for the Oklahoma Center of Nonprofits. "Otherwise, you could be putting money into all sorts of scams." There is "zero accountability" for the crowdfunding site or the recipient to provide proof that the dollars were indeed funneled into health-related expenses.
Even if donors may have limited recourse against scammers, the "platforms have an ethical obligation to protect the people using their site from fraud," says Bryanna Moore, a postdoctoral fellow at Baylor College of Medicine's Center for Medical Ethics and Health Policy. "It's easy to take advantage of people who want to be charitable."
There are "different layers of deception" on a broad spectrum of fraud, ranging from "outright lying for a self-serving reason" to publicizing an imaginary illness to collect money genuinely needed for basic living expenses. With medical campaigns being a top category among crowdfunding appeals, it's "a lot of money that's exchanging hands," Moore says.
The advent of crowdfunding "reveals and, in some ways, reinforces a health care system that is totally broken," says Jessica Pierce, a faculty affiliate in the Center for Bioethics and Humanities at the University of Colorado Anschutz Medical Campus in Denver. "The fact that people have to scrounge for money to get life-saving treatment is unethical."
Crowdfunding also highlights socioeconomic and racial disparities by giving an unfair advantage to those who are social-media savvy and capable of crafting a compelling narrative that attracts donors. Privacy issues enter into the picture as well, because telling that narrative entails revealing personal details, Pierce says, particularly when it comes to children, "who may not be able to consent at a really informed level."
CoFund Health, the crowdfunding site on which Anderson raised the money for his plastic surgery, offers to help people write their campaigns and copy edit for proper language, says Matthew Martin, co-founder and chief executive officer. Like other crowdfunding sites, it retains a few percent of the donations for each campaign. Martin is the husband of Anderson's acquaintance from high school.
So far, the site, which is based in Raleigh, North Carolina, has hosted about 600 crowdfunding campaigns, some completed and some still in progress. Campaigns have raised as little as $300 to cover immediate dental expenses and as much as $12,000 for cancer treatments, Martin says, but most have set a goal between $5,000 and $10,000.
Whether or not someone's campaign is based on fact or fiction remains for prospective donors to decide.
The services could be cosmetic—for example, a breast enhancement or reduction, laser procedures for the eyes or skin, and chiropractic care. A number of campaigns have sought funding for transgender surgeries, which many insurers consider optional, he says.
In July 2019, a second site was hatched out of pet owners' requests for assistance with their dogs' and cats' medical expenses. Money raised on CoFund My Pet can only be used at veterinary clinics. Martin says the debit card would be declined at other merchants, just as its CoFund Health counterpart for humans will be rejected at places other than health care facilities, dental and vision providers, and pharmacies.
Whether or not someone's campaign is based on fact or fiction remains for prospective donors to decide. If a donor were to regret a transaction, he says the site would reach out to the campaign's owner but ultimately couldn't force a refund, Martin explains, because "it's hard to chase down fraud without having access to people's health records."
In some crowdfunding campaigns, the individual needs some or all the donated resources to pay for travel and lodging at faraway destinations to receive care, says Snyder, the health sciences professor and crowdfunding report author. He suggests people only give to recipients they know personally.
"That may change the calculus a little bit," tipping the decision in favor of donating, he says. As long as the treatment isn't harmful, the funds are a small gesture of support. "There's some value in that for preserving hope or just showing them that you care."
Coronavirus Misinformation: How You Can Fight Back
Turn yourself into a source of coronavirus facts and a bulwark against the fake, misleading and fraudulent.
When it comes to fighting the new coronavirus threat, the truth is one of the few things more crucial than a gallon of hand sanitizer. But these days, both can be hard to find if you don't know where to look.
"Humans are wired to respond to emotional triggers and share misinformation if it reinforces existing beliefs and prejudices."
While it's only been around for a few months, COVID-19 has already produced an ever-expanding universe of conspiracy theories about its origins, its spread, and the danger it poses. Meanwhile, fraudulent cures and myths about treatments threaten to upend public health efforts to contain the epidemic.
But ordinary citizens aren't helpless. Research offers insight into why we're susceptible to misinformation, and armies of fact-checkers can tell us what's real and what isn't. Meanwhile, experts are offering tips about how we can effectively promote facts whether we're chatting with a stranger at the post office or challenging a cousin on Facebook.
Here a four-part strategy to help you fight back against the Coronavirus Misinformation Industrial Complex:
Understand How Bogus Beliefs Work
That crank on the Internet may be your neighbor. Or maybe even you.
According to a 2014 study published in JAMA Internal Medicine, nearly half of American surveyed said they believed in at least one grand medical conspiracy theory. Twenty percent agreed, for example, that cell phones cause cancer but officials won't do anything because of corporate pressure, and 37 percent believed an elaborate conspiracy theory about the suppression of natural cancer cures. "Although it is common to disparage adherents of conspiracy theories as a delusional fringe of paranoid cranks, our data suggest that medical conspiracy theories are widely known, broadly endorsed, and highly predictive of many common health behaviors," the study authors write.
In an interview with leapsmag, study lead author Eric Oliver said we're drawn to "conspiracy theories that correspond with our intuitions."
"In the case of medicine, I think there are three big factors: Fears of Big Pharma -- a large percentage of Americans have a distorted sense of what pharmaceutical companies are capable of -- fears of government, and fears of contagion," said Oliver, a political scientist at the University of Chicago.
Why does it matter if people believe in conspiracy theories about coronavirus? As Oliver's study notes, conspiracy theorists are less likely to rely on traditional medicine, get flu shots, or go to annual check-ups. They could be especially susceptible to disease and inappropriate treatment.
Joseph Uscinski, a professor of political science at the University of Miami who studies conspiracies, elaborated on how this works. "You could have people who think coronavirus is fake and say, 'I'm not going to wash my hand or take preventive action. This is the media making something up, or this is just a plot for the pharmaceutical companies to sell a vaccine.' If you have a lot of people acting that way, that increases the ability of the virus to spread."
Get the Facts from the Experts
How can you avoid being a misinformation source? Educate yourself to make sure you're not spouting fake facts yourself with the instant ease that the Internet allows. "Humans are wired to respond to emotional triggers and share misinformation if it reinforces existing beliefs and prejudices," writes misinformation scholar Claire Wardle in a 2019 Scientific American commentary. That means you too.
For coronavirus facts, experts recommend looking to the websites of government agencies (such as the CDC, World Health Organization and National Institutes of Health) and top-tier medical organizations (Mayo Clinic, Infectious Disease Society of America).
Respected mainstream news outlets such as The New York Times and National Public Radio offer extensive original reporting on the coronavirus threat. While some news outlets still require users to pay to get full access to stories, others have dropped their paywalls and made coronavirus content free to all. These include the Seattle Times, Bloomberg News and the medical news site Stat.
Locally, look to your region's public health department, news outlets, and medical organizations such as hospitals and health plans.
The Poynter Institute, a journalism watchdog outfit, offers a helpful guide to evaluating what you read about coronavirus. And a paid service called NewsGuard offers a browser plug-in that provides a "trust rating" for popular news sites. "Our goal is to teach news literacy–and we hope all websites will earn green ratings and be generally reliable to consumers," the NewsGuard site says.
"As we combat misinformation, we also need to be mindful of the fact that we're dealing with a lot of uncertainty."
Remember, however, that scientists and physicians are learning more about the coronavirus each day. Assumptions about the virus will change as more information comes in, and there are still many questions about crucial topics like its fatality rate and the ways the virus spreads. You should expect that reliable sources – and experts – may provide conflicting information.
"As we combat misinformation, we also need to be mindful of the fact that we're dealing with a lot of uncertainty," says Boston cardiologist and author Dr. Haider Warraich of Brigham and Women's Hospital.
Double-Check Suspicious Information
No, the coronavirus wasn't created in a Winnipeg laboratory. You can't kill it by drinking bleach or frolicking in snow. And, as the French Health Ministry helpfully advised on Twitter, "Non, La cocaïne NE protège PAS contre le #COVID19" – "No, cocaine does NOT prevent Covid-19."
Facebook, YouTube and Twitter are all trying to remove fake or misleading coronavirus content, The New York Times reported, and "all said they were making efforts to point people back to reliable sources of medical information." Still, as the Times reports, bogus cures and conspiracy theories are rampant across social media and beyond.
Fortunately, there are many fact-checking resources. Turn to them for ammunition before you amplify – or challenge -- a coronavirus claim that seems suspicious.
Helpful myth-busting resources include:
** The venerable fact-checking site Snopes.com, which has checked multiple coronavirus claims. (Example: No, garlic water won't cure coronavirus.)
** The World Health Organization. (Example: No, mosquito bites can't transmit coronavirus)
** FactCheck.org. (Example: No, a disgraced Harvard scientist wasn't arrested for creating the coronavirus.)
** PolitiFact.org. (Example: No, the coronavirus is not just "the common cold.")
** The International Fact-Checking Network, accessible via the social-media hashtags #CoronaVirusFacts and #DatosCoronaVirus.
Correct Others With Caution
On social media, anger and sarcasm make up a kind of common tongue. But sick burns won't force misinformed people see the light. Instead, try a gentler approach.
"The most important thing would be to first acknowledge their anxieties rather than first trying to rationalize away their misbeliefs," said the University of Chicago's Oliver. "People embrace misinformation and conspiracy theories because they are afraid and trying to make sense of the world. Their beliefs serve a strong emotional function and will be defended as such. Trying to rationalize with them or argue with them may be counterproductive if one can't first put them at some ease."
Turn yourself into a source of coronavirus facts and a bulwark against the fake, misleading, and fraudulent.
So what can you do? "There will never be a magic bullet," the University of Miami's Uscinski said, but one approach is to highlight reliable information from sources that the person trusts, such as news outlets (think MSNBC or Fox News) or politicians.
However, don't waste your time. "If you have people who are believing in the craziest thing, they're probably not going to offer a rational conversation," he said. And, he added, there's an alternative to correcting others: Turn yourself into a source of coronavirus facts and a bulwark against the fake, misleading, and fraudulent. "We can be preventive and inoculate people against these beliefs," he said, "by flooding the information environment with proper information as much as possible."