Going Viral, or Not, in the Milky Way

Last weekend the American space program resumed one of its most cherished and iconic traditions: launching astronauts into space from its own soil and with its own rockets, after a decade of hitching rides to the International Space Station with…

Last weekend the American space program resumed one of its most cherished and iconic traditions: launching astronauts into space from its own soil and with its own rockets, after a decade of hitching rides to the International Space Station with the Russians.

The event was celebrated as the beginning of a new era in spaceflight, with talk of moon colonies, Mars voyages, space tourism, interplanetary capitalism and the cool new SpaceX spacesuits. “We are proving out a business model, a public-private partnership business model that ultimately will enable us to go to the moon, this time sustainably,” Jim Bridenstine, NASA’s administrator, said at a news conference on May 26.

But this triumphant talk shared the headlines with more disquieting news about our vulnerabilities back on Earth. In the week before the launch, the death toll from the coronavirus surpassed 100,000 in the United States, and the frustrations generated by the pandemic — abrupt and widespread unemployment, glaring social inequity — surely helped fuel the unrest that roiled many cities over the weekend.It was hard not to see it as an ominous signal, reinforcing a message some thinkers say has been sent by the universe regarding our cosmic destiny as a species. In 1998, Robin Hanson, now an economics professor at George Mason University, posed a vexing question: If the universe is such a garden of possibility, as astrobiologists and cosmologists proclaim, why amid billions of worlds and after billions of years is there no evidence of anybody out there to greet us?Where are the alien ham radio operators beaming scientific secrets or extraterrestrial poetry? Why no mysterious engineering projects out among the stars? Where’s our invitation from the Galactic Council? As the great physicist Enrico Fermi once asked, “Where is everybody?”Maybe the Great Filter got them, Dr. Hanson proposed. The Great Filter is a civilization-scale event or circumstance that would prevent a species from colonizing space or ever meeting other species — perhaps of even continuing to exist.The filter could be a chemical bottleneck that prevents the formation of RNA that jump-started evolution, or a geophysical roadblock to the production of oxygen, which enabled multicellular creatures. But the filter could also be nuclear war, or a world-destroying asteroid, or global warming, or a malevolent artificial intelligence gone amok. Or, even, a vicious pandemic. “The fact that space near us seems dead now tells us that any given piece of dead matter faces an astronomically low chance of begetting such a future,” Dr. Hanson wrote. “There thus exists a great filter between death and expanding lasting life, and humanity faces the ominous question: How far along this filter are we?”Could microbes derail our plans for outer space? Authorities as diverse as Dr. Anthony Fauci and Tom Hanks have assured us the present pandemic is not The End, but it’s hard to not view it as a rehearsal.A colorized scanning electron micrograph of a cell infected with coronavirus particles, in yellow.Credit…NIAID, via ReutersMartin Rees, a.k.a. Lord Rees of Ludlow, a cosmologist at Cambridge University and co-founder of the Center for the Study of Existential Risk, detailed some of the ways we might die in his book “Our Final Hour: A Scientist’s Warning: How Terror, Error, and Environmental Disaster Threaten Humankind’s Future In This Century — On Earth and Beyond.” When the coronavirus began to wreak havoc in China, I emailed Dr. Rees to ask if this was what the Great Filter might look like.“These global pandemics present an intractable problem,” he wrote back. “Obviously, if we understand viruses better, we can develop vaccines.” But, he added, “The downside is that it entails also an increase in the spread of ‘dangerous knowledge’ that would enable mavericks to make viruses more virulent and transmissible than they naturally are.”Part of the message of Professor Rees’s book, and others like it, is that we have grown too big and interconnected for our own good, too smart for our pants. As a result, we are pushing on the most ominous term in the famous Drake Equation, developed by the American astronomer Frank Drake, which is used to estimate the number of technological civilizations in the galaxy: the average lifetime of a technological society.Frank Drake with his eponymous equation, which predicts the number of observable civilizations in our galaxy.Credit…Dr. Seth Shostak/Science SourceHow long can a high-tech society survive? No matter how likely it may be for planets to form, for those planets to seed life, and for that life to be intelligent, if the resulting civilizations don’t last long enough, they will never overlap in time and space. Each civilization could bloom and then fade by itself, never knowing a neighbor. If that isn’t a recipe for cosmic loneliness, I don’t know what is.There is a loophole in this cloud of gloom. In Arthur C. Clark’s science-fiction story “The Sentinel,” which served as the basis for Stanley Kubrick’s film “2001: A Space Odyssey,” a pair of astronauts find a little pyramid on top of a mountain on the moon. When they approach it, it sends off an alarm; the astronauts are left wondering who received that signal and when “they” will be coming.We have not yet explored our solar system thoroughly enough to be able to say that there is not such a sentinel, left by some extraterrestrial other, hidden on Mars or some other body. As SETI enthusiasts like to say, “Absence of evidence is not evidence of absence.”We don’t know for sure that we are alone. But we might be on the way to finding out, as we scatter our own relics throughout the solar system. This year alone, three more robot missions are headed for Mars.Dr. Rees, in a more recent note, pointed out that thinking about the long-term future has evolved since 1961 when Dr. Drake first presented his equation. Among other things, artificial intelligence, just a gleam in a few dreamers’ eyes back then, has become a big deal. Deep-learning networks are becoming embedded in science, politics and society — to what end, we have only begun to debate. They are the future.“A ‘civilization’, in the sense of a collectivity of intelligent technologically adept beings, may exist for only a few millenniums,” Dr. Rees wrote. “But their legacy could be some kind of ‘brains’ that could persist for a billion years.” And they could be thinking deep thoughts that we can’t comprehend.“They are the entities that a SETI search is most likely to reveal (if it reveals anything),” he wrote. The Coronavirus Outbreak Frequently Asked Questions and Advice Updated June 1, 2020 How do we start exercising again without hurting ourselves after months of lockdown? Exercise researchers and physicians have some blunt advice for those of us aiming to return to regular exercise now: Start slowly and then rev up your workouts, also slowly. American adults tended to be about 12 percent less active after the stay-at-home mandates began in March than they were in January. But there are steps you can take to ease your way back into regular exercise safely. First, “start at no more than 50 percent of the exercise you were doing before Covid,” says Dr. Monica Rho, the chief of musculoskeletal medicine at the Shirley Ryan AbilityLab in Chicago. Thread in some preparatory squats, too, she advises. “When you haven’t been exercising, you lose muscle mass.” Expect some muscle twinges after these preliminary, post-lockdown sessions, especially a day or two later. But sudden or increasing pain during exercise is a clarion call to stop and return home. My state is reopening. Is it safe to go out? States are reopening bit by bit. This means that more public spaces are available for use and more and more businesses are being allowed to open again. The federal government is largely leaving the decision up to states, and some state leaders are leaving the decision up to local authorities. Even if you aren’t being told to stay at home, it’s still a good idea to limit trips outside and your interaction with other people. What’s the risk of catching coronavirus from a surface? Touching contaminated objects and then infecting ourselves with the germs is not typically how the virus spreads. But it can happen. A number of studies of flu, rhinovirus, coronavirus and other microbes have shown that respiratory illnesses, including the new coronavirus, can spread by touching contaminated surfaces, particularly in places like day care centers, offices and hospitals. But a long chain of events has to happen for the disease to spread that way. The best way to protect yourself from coronavirus — whether it’s surface transmission or close human contact — is still social distancing, washing your hands, not touching your face and wearing masks. What are the symptoms of coronavirus? Common symptoms include fever, a dry cough, fatigue and difficulty breathing or shortness of breath. Some of these symptoms overlap with those of the flu, making detection difficult, but runny noses and stuffy sinuses are less common. The C.D.C. has also added chills, muscle pain, sore throat, headache and a new loss of the sense of taste or smell as symptoms to look out for. Most people fall ill five to seven days after exposure, but symptoms may appear in as few as two days or as many as 14 days. How can I protect myself while flying? If air travel is unavoidable, there are some steps you can take to protect yourself. Most important: Wash your hands often, and stop touching your face. If possible, choose a window seat. A study from Emory University found that during flu season, the safest place to sit on a plane is by a window, as people sitting in window seats had less contact with potentially sick people. Disinfect hard surfaces. When you get to your seat and your hands are clean, use disinfecting wipes to clean the hard surfaces at your seat like the head and arm rest, the seatbelt buckle, the remote, screen, seat back pocket and the tray table. If the seat is hard and nonporous or leather or pleather, you can wipe that down, too. (Using wipes on upholstered seats could lead to a wet seat and spreading of germs rather than killing them.) How many people have lost their jobs due to coronavirus in the U.S.? More than 40 million people — the equivalent of 1 in 4 U.S. workers — have filed for unemployment benefits since the pandemic took hold. One in five who were working in February reported losing a job or being furloughed in March or the beginning of April, data from a Federal Reserve survey released on May 14 showed, and that pain was highly concentrated among low earners. Fully 39 percent of former workers living in a household earning $40,000 or less lost work, compared with 13 percent in those making more than $100,000, a Fed official said. Can I go to the park? Yes, but make sure you keep six feet of distance between you and people who don’t live in your home. Even if you just hang out in a park, rather than go for a jog or a walk, getting some fresh air, and hopefully sunshine, is a good idea. How do I take my temperature? Taking one’s temperature to look for signs of fever is not as easy as it sounds, as “normal” temperature numbers can vary, but generally, keep an eye out for a temperature of 100.5 degrees Fahrenheit or higher. If you don’t have a thermometer (they can be pricey these days), there are other ways to figure out if you have a fever, or are at risk of Covid-19 complications. Should I wear a mask? The C.D.C. has recommended that all Americans wear cloth masks if they go out in public. This is a shift in federal guidance reflecting new concerns that the coronavirus is being spread by infected people who have no symptoms. Until now, the C.D.C., like the W.H.O., has advised that ordinary people don’t need to wear masks unless they are sick and coughing. Part of the reason was to preserve medical-grade masks for health care workers who desperately need them at a time when they are in continuously short supply. Masks don’t replace hand washing and social distancing. What should I do if I feel sick? If you’ve been exposed to the coronavirus or think you have, and have a fever or symptoms like a cough or difficulty breathing, call a doctor. They should give you advice on whether you should be tested, how to get tested, and how to seek medical treatment without potentially infecting or exposing others. How do I get tested? If you’re sick and you think you’ve been exposed to the new coronavirus, the C.D.C. recommends that you call your healthcare provider and explain your symptoms and fears. They will decide if you need to be tested. Keep in mind that there’s a chance — because of a lack of testing kits or because you’re asymptomatic, for instance — you won’t be able to get tested. How can I help? Charity Navigator, which evaluates charities using a numbers-based system, has a running list of nonprofits working in communities affected by the outbreak. You can give blood through the American Red Cross, and World Central Kitchen has stepped in to distribute meals in major cities. If humanity survives to keep searching and exploring, that is. That is hardly guaranteed; we are all here, the virus included, just for a while.A lifetime wandering the halls of science has made it pretty obvious, to me anyway, that nature has no particular preference for humans — or democracy, for that matter. (Dinosaurs might have been justified in thinking they were the apple of the cosmic eye, but you can’t find one now to ask how that felt.) We are on our own; we can’t count on help from anybody but ourselves.But I can’t help hoping, despite the immaculate mathematical rigor employed by thinkers like Dr. Hanson and others, that we can still beat the odds. We have bloomed but not faded— yet. Call it the Great Reset, or a cosmic wake-up call.In March, when the pandemic shut down the lab in Italy where Cristiano Galbiati, a Princeton physics professor, was working on a dark matter experiment, he went to stay with family in Milan.He quickly discovered that ventilators, needed to keep the most desperately ill patients alive, were in desperately short supply — and cost as much as a new car. Dr. Galbiati organized a network of particle physicists to design a simple, cheap “open source” ventilator that could be built anywhere. His colleagues eagerly joined the effort.A month later their ventilator, the Mechanical Ventilator Milano, was approved for emergency use by the U.S. Food and Drug Administration. It is one of a host of simple ventilators to have emerged from places like M.I.T., NASA and other university and industrial labs.“You know, one way I like to think of it is that it may be true that the virus is spreading, as they say, at the speed of jets,” Dr. Galbiati said. “But our research is expanding at the speed of light. And you know, these keep me in a sense that we will prevail.”Mars or bust, I say.Credit…NASA Ames Research CenterSync your calendar with the solar systemNever miss an eclipse, a meteor shower, a rocket launch or any other astronomical and space event that’s out of this world.