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Why do we buy roses on Valentine's Day?
Amongst other reasons, because they don't mind planes.

According to the National Retail Federation, in 2018, 54.7% of U.S. adults will celebrate Valentine’s Day by engaging in some form of buying stuff. Total spending is expected to reach $19.6 billion and $2 billion of it will be spent on flowers. Most of them: roses. But why is that?
Roses migrated to Europe and the rest of the world from Persia (present-day Iran), and as far as we know, the first rose was planted about 5000 years ago. A long time would pass, however, before they became the commercial symbol of love that they are today.
It was in the 19th century, in Victorian Britain, that flowers in general became an important tool for communication. As any Jane Austin fan will tell you, during these times, sharing emotions with other people, especially those that were of interest, was a complicated thing. Social convention frowned upon open flirtation and even upon many forms of simple conversation.
One of the work-arounds society came up with was floriography, the “secret” language of flowers. People started using different types of flowers and plants to convey messages. And it wasn’t just the type of flowers that mattered but also the way they were arranged, the way they were delivered, and how they were received. Special dictionaries appeared that helped decode those messages.
Click image to zoom. "Language of flowers" by Greenaway, Kate, 1846-1901. Credit: The Internet Archive
According to this language of flowers and plants, the red rose symbolizes love, the marigold grief, and the potato benevolence. But there were other plants that could also mean love, passion, affection, and friendship. Ultimately, the reason why the rose became the chosen one to stand for all that was that it could simply endure a lot.
February, the month of Valentine’s Day, is not the best time for growing flowers north of the equator. So, after the industrial revolution and the commercialization of Valentine’s Day, suppliers had to be able to grow, box, and transport flowers from places like Columbia, Ecuador, Kenya and other African or South American countries. The rose, as it turns out, can withstand all this torture and still look good when you present it to your loved one.
A Planet Money episode on the worldwide rose supply chain explains:
“Roses were the perfect choice because they are pretty much indestructible. We didn't just set up this global transportation chain in order to get this traditional flower, roses. We actually started to like roses because they were optimized for the global transportation chain. They were the flower that worked best with the planes and the boxes and the farms.”
Before the rose, people just gifted each other whatever flower was available locally, like violets, for example.
Having said all this, if you would like to be a bit adventurous this Valentine’s day, substitute the rose for something else. Here are some ideas on what is grown locally in the U.S. during this time of the year. Or why not opt-out from buying anything at all and instead write a love letter, put together a mixtape (a.k.a. Spotify playlist), or create a photo album. Yes, an actual, printed photo album with selected memories from your best times together.

What is the purpose of universities?
For centuries, universities have advanced humanity toward truth. Professor Jonathan Haidt speaks to why college campuses are suddenly heading in the opposite direction.
Left: Professor Jonathan Haidt. Right: Artistotle.
- In a lecture at UCCS, NYU professor Jonathan Haidt considers the 'telos' or purpose of universities: To discover truth.
- Universities that prioritize the emotional comfort of students over the pursuit of truth fail to deliver on that purpose, at a great societal cost.
- To make that point, Haidt quotes CNN contributor Van Jones: "I don't want you to be safe ideologically. I don't want you to be safe emotionally. I want you to be strong—that's different."
CNN contributor Van Jones speaks onstage at the EMA IMPACT Summit in 2018.
Credit: Michael Kovac/Getty Images for Environmental Media Association
<p>There are many places and institutions whose purpose, or <em>telos</em>, is comfort. But a university is not one of those places. To make that point, Haidt quotes CNN contributor Van Jones:</p><p style="margin-left: 20px;">I don't want you to be safe ideologically. I don't want you to be safe emotionally. I want you to be strong—that's different. I'm not going to pave the jungle for you. Put on some boots and learn how to deal with adversity. I'm not going to take all the weights out of the gym. That's the whole point of the gym. <em>This</em> is the gym.</p><p>By prioritizing comfort over the pursuit of truth, universities are ignoring their purpose. Higher education should be an arena of open inquiry and free expression, where ideas are exchanged, tested, and scrutinized. A liberal education should be "an invitation to be concerned not with the employment of what is familiar but with understanding what is not yet understood," <a href="https://books.google.com/books?id=Jpu7BAAAQBAJ&pg=PT286&lpg=PT286&dq=%22an+invitation+to+be+concerned+not+with+the+employment+of+what+is+familiar+but+with+understanding+what+is+not+yet+understood.%E2%80%9D&source=bl&ots=bmqaS1BxSm&sig=ACfU3U0aOokPZOGJlLFUVO9-a8VBV50tCw&hl=en&sa=X&ved=2ahUKEwi_u-jd1_btAhWqzVkKHSdKBMsQ6AEwAnoECAEQAg#v=onepage&q=%22an%20invitation%20to%20be%20concerned%20not%20with%20the%20employment%20of%20what%20is%20familiar%20but%20with%20understanding%20what%20is%20not%20yet%20understood.%E2%80%9D&f=false" target="_blank">according</a> to philosopher Michael Oakeshott.</p>You might also like:
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="d1a3bbdeaba1ed201e5892b6a2ccbfb5"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/IoXpNJLFngc?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>Octopus-like creatures inhabit Jupiter’s moon, claims space scientist
A leading British space scientist thinks there is life under the ice sheets of Europa.
Jupiter's moon Europa has a huge ocean beneath its sheets of ice.
- A British scientist named Professor Monica Grady recently came out in support of extraterrestrial life on Europa.
- Europa, the sixth largest moon in the solar system, may have favorable conditions for life under its miles of ice.
- The moon is one of Jupiter's 79.
Neil deGrasse Tyson wants to go ice fishing on Europa
<div class="rm-shortcode" data-media_id="GLGsRX7e" data-player_id="FvQKszTI" data-rm-shortcode-id="f4790eb8f0515e036b24c4195299df28"> <div id="botr_GLGsRX7e_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/GLGsRX7e-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"></script> </div>Water Vapor Above Europa’s Surface Deteced for First Time
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="9c4abc8473e1b89170cc8941beeb1f2d"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/WQ-E1lnSOzc?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>From NASA to your table: A history of food from thin air
A fairly old idea, but a really good one, is about to hit the store shelves.
- The idea of growing food from CO2 dates back to NASA 50 years ago.
- Two companies are bringing high-quality, CO2-derived protein to market.
- CO2-based foods provide an environmentally benign way of producing the protein we need to live.
The basic idea
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTQ0NTM3Ny9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYxOTc4NzE1MX0.qxFjO6GkVVEjS_VEKy4pIkrmv-gknDbBgTHourWFUcc/img.jpg?width=980" id="20397" class="rm-shortcode" data-rm-shortcode-id="fa52d13cbf404456d0a5be77ff2e091e" data-rm-shortcode-name="rebelmouse-image" data-width="1089" data-height="898" />Credit: Big Think
<p> The basic mechanism for deriving food from CO<sup>2</sup> involves a fairly simple closed-loop system that executes a process over and over in a cyclical manner, producing edible matter along the way. In space, astronauts produce carbon dioxide when they breathe, which is then captured by microbes, which then convert it into a carbon-rich material. The astronauts eat the material, breathe out more CO<sup>2</sup>, and on and on. On Earth, the CO<sup>2</sup> is captured from the atmosphere. </p>Drawing first breath
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTQ0NTM3NS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NDQyNjAwMH0.3b4FuXhLwAqGtXzFu2dw8Gec6phKp3bxkajLOJKFOYE/img.jpg?width=980" id="03d4b" class="rm-shortcode" data-rm-shortcode-id="a5131ef8090c05af83989905de39c53d" data-rm-shortcode-name="rebelmouse-image" data-width="1000" data-height="780" />Credit: NASA
<p> NASA's investigation into using CO<sup>2</sup> for food production began with a 1966 report written by R. B. Jagow and R. S. Thomas and published by Ames Research Center. The nine-chapter report was called "<a href="https://ntrs.nasa.gov/citations/19670025254" target="_blank">The Closed Life-Support System</a>." Each chapter contained a proposal for growing food on long missions. </p><p> Chapter 8, written by J. F. Foster and J. H. Litchfield of the Battelle Memorial Institute in Columbus, Ohio, proposed a system that utilized a hydrogen-fixing bacteria, <em><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC247306/" target="_blank">Hydrogenomonas</a></em>—NASA had been experimenting with the bacteria for several years at that point—and recycled CO<sup>2</sup> in a compact, low-power, closed-loop system. The system would be able to produce edible cell matter in way that "should then be possible to maintain continuous cultures at high efficiencies for very long periods of time." </p><p> At the time, extended missions that would benefit from such a system were off in the future. </p><p> In 2019, and with its eye toward upcoming Mars missions, NASA returned to the idea, sponsoring the <a href="https://www.nasa.gov/directorates/spacetech/centennial_challenges/co2challenge/challenge-announced.html" target="_blank">CO2 Conversion Challenge</a>, "seeking novel ways to convert carbon dioxide into useful compounds." Phase 1 of the contest invited proposals for processes that could "convert carbon dioxide into glucose in order to eventually create sugar-based fuel, food, medicines, adhesives and other products." </p><p> In May 2109, NASA announced the <a href="https://www.nasa.gov/spacetech/centennial_challenges/co2challenge/winning-teams-design-systems-to-convert-carbon-dioxide-into-something-sweet.html" target="_blank">winners</a> of Phase 1. The space agency concluded acceptance of <a href="https://www.co2conversionchallenge.org/#about" target="_blank">Phase 2</a> entries on December 4, 2020.</p>Approaching the Finnish line
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTQ0NTM2Mi9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0MTkyNDYzNH0.02upErPyJQO5YvKEmk-Hqrve4Prg_5cZHMaXBFCAbOQ/img.jpg?width=980" id="e593a" class="rm-shortcode" data-rm-shortcode-id="e2d8de8068bcd9f497f284d2fafc7b9c" data-rm-shortcode-name="rebelmouse-image" data-width="1400" data-height="930" />Solein "meatballs"
Credit: Solar Foods
<p> We've <a href="https://bigthink.com/technology-innovation/protein-from-air?rebelltitem=1#rebelltitem1" target="_self">written previously</a> about <a href="https://solarfoods.fi" target="_blank">Solar Foods</a>, a company backed by the Finnish government who <a href="https://solarfoods.fi/our-news/business-finland-greenlights-solar-foods-e8-6m-project/" target="_blank">recently invested</a> €4.3 million to help complete the company's €8.6 million commercialization of their nutrient-rich CO<sup>2</sup>-based protein powder, <a href="https://solarfoods.fi/solein/" target="_blank">Solein</a>. The company anticipates Solein will provide protein to some 400 million meals by 2025, and has so far developed 20 different food products from it. </p>In the air tonight
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTQ0NTM2NC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY3MjQ4MjgxMH0.6VP4Aw_JzTG7lnuQeXiUnpAppJTdnsxVTuPdiUiW9oI/img.jpg?width=980" id="4b5a0" class="rm-shortcode" data-rm-shortcode-id="9e683650fd8175592794dff6ae0799bf" data-rm-shortcode-name="rebelmouse-image" data-width="1440" data-height="894" />Air Protein taco
Credit: Air Protein
<p> Another player, <a href="https://www.airprotein.com" target="_blank">Air Protein</a>, is based in California's Bay Area and is also bringing to market their own CO<sup>2</sup> protein named after the company. The company <a href="https://www.prnewswire.com/news-releases/air-protein-introduces-the-worlds-first-air-based-food-300955972.html" target="_blank">describes</a> it as a "nutrient-rich protein with the same amino acid profile as an animal protein and packed with crucial B vitamins, which are often deficient in a vegan diet." </p><p> The company recently <a href="https://www.greenqueen.com.hk/air-protein-bags-us32m-in-series-a-to-commercialise-climate-friendly-meat/" target="_blank">secured $32 million</a> in venture-capital funding. </p><p> Although Air Protein is actually flour—like Solein—the company is positioning Air Protein as offering "the first air-based meat," while Solein was announced first, and there's <a href="https://www.afr.com/life-and-luxury/food-and-wine/company-that-makes-meat-out-of-air-attracts-big-backers-20210108-p56sk0" target="_blank" rel="noopener noreferrer">no public timetable</a> yet for the arrival of Air Protein products on store shelves. In any event, non-animal "meats" are a <a href="https://bigthink.com/technology-innovation/whopper" target="_self">hot market</a> these days with the success of Beyond Burger and Impossible Foods cruelty-free meat substitutes. </p>Striking oil
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTQ0NTM2Ny9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1MzE3NjA3NH0.1o05KthbzT9JokT7-0UzWDq4MiLIfXJIGfPddhLNKqk/img.jpg?width=980" id="a45ef" class="rm-shortcode" data-rm-shortcode-id="143316dcc3691fcce024e83a6cbaca3f" data-rm-shortcode-name="rebelmouse-image" data-width="1440" data-height="959" />Deforestation for palm oil
Credit: whitcomberd/Adobe Stock
<p> Though Air Protein's promotional materials emphasize meat substitutes that will be derived from their flour, a <a href="https://youtu.be/c8WMM_PUOj0" target="_blank">TED Talk</a> by company co-founder Lisa Dyson reveals another Air Protein product that could arguably have an even greater impact by potentially eliminating the need for palm oil and the deforestation it requires — their CO<sup>2</sup> process can produce oils.</p><p><span></span>The company has already created a citrus-like oil that can be used for fragrances, flavoring, as a biodegradable cleaner, and "even as a jet fuel." Perhaps more excitingly, the company has made another oil that's similar to palm oil. Since palm trees are the <a href="https://www.ran.org/palm_oil_fact_sheet" target="_blank">crop most responsible</a> for the decimation of the world's rain forests, an environmentally benign replacement for it would be a very big deal. Dyson also notes that their oils could substitute morally problematic coconut oil, whose harvesting has lately been reported to often involve the abuse of macaque monkeys.</p>Putting carbon dioxide to work
<p> We know we have too much of the stuff, so finding a way of utilizing at least some CO<sup>2</sup> to create foods and other products that reduce the need for destructive commercial practices is a solid win for humankind. Harkening back to its NASA origins, Dyson notes in her talk that Earth, too, is sort of a self-contained spaceship, albeit a big one. Finding new ways to productively reuse what it has to offer clearly benefits us all. </p>Can you step in the same river twice? Wittgenstein vs. Heraclitus
Imagine Heraclitus spending an afternoon down by the river...
Cancer cells hibernate to survive chemotherapy, finds study
Researchers discover that cancer cells go into hibernation to avoid chemotherapy effects.
