And as the other poster correctly guesses, this was a sarcastic reference to covid.

Oh well. Maybe when that happens.

I'm not sure it's actually more evil than any other upper-class institution, but that evil manifests itself uniquely through extremely punchable human beings rather than through massive faceless investment firms. In the grand scheme of things, SBF almost certainly does less harm than a lot of defense contractors do, but SBF did it in a way that makes him, personally, the asshole (rather than just a blob of people following economic incentives).

"Azure" is an English color-word, but an English speaker recognizes "azure" as a kind of "blue". But "blue" is not a kind of "green" or a kind of "purple" or a kind of anything else. Hence, "blue" is a basic English color-word.

Typical English dialects have eleven basic color words: white, gray, black, brown, pink, red, orange, yellow, green, blue, and purple. Other color-words in English are considered variants of one of these eleven terms. That wasn't always true ("pink" is the most recent addition, dating to the early 1700s), but it's pretty well-established by modern English speakers. Other languages may make fewer distinctions (e.g. until about the last century Japanese used ao(i) as a basic color word that encompassed both blue and green, so e.g. a traffic light is aoi by tradition even though the modern word for green is midori) or more (e.g. Russian distinguishes light blue goluboi and dark blue sinii similarly to how English distinguishes red and pink). To an old Japanese speaker, blue and green were both shades of ao, and to a modern Russian speaker, goluboi is as distinct from sinii as "red" is from "pink" in English (they are not both "shades of blue" any more than pink and red are "shades of reddish" in English).

[1] https://www.pewresearch.org/short-reads/2016/12/13/whats-on-...

[2] https://news.gallup.com/poll/328241/americans-average-weight...

In a horseshoe orbit, when the small body approaches the medium body "from behind" (that is, the small body is moving faster than the medium body), the medium body tugs the small body forward. That is an effective forward thrust for the small body, which rises into a higher orbit and slows down as a result. That means the small body starts to fall behind, losing ground relative to the medium body.

After it loses enough ground, it approaches the medium body from the front (or, if you prefer, the medium body catches up to it from behind). Then the medium body's gravity tugs it backward, dropping it into a lower and faster orbit, and the cycle repeats.

The most exceptional example of this is two of Saturn's moons, Janus and Epimetheus, which share an orbit and periodically trade places in it as a result of these dynamics.

The classic example is the "Theorem on Friends and Strangers", which states that in any group of six or more people, there is always some subset of three people who are either pairwise friends or pairwise strangers (or, in graph theoretic terms, three vertices that are either all pairwise connected by an edge or pairwise not connected by an edge).

This generalizes to larger subsets: in any group of 18 or more people, there's always some subset of four people who are pairwise friends or strangers, and in any group of 49 or more, there's always some subset of five (49 may not be optimal here; it's known to be between 43 and 49). The known bounds are quite weak: the number of people required to guarantee a mutual-friends-or-strangers subset of n people is known only to be omega(2^(n/2)) and little-o(2^2n), with no improvements on those bounds made despite nearly a century of work.

Mathematically, this corresponds to solutions to a particular differential equation existing for particular values of energy (which appears as a constant in the equation). To use a simpler DE for an example: dx/dt = kx has solutions Ce^kt for all k, but a more complicated DE might only have solutions for some k.

Hence, in English-speaking usage, "Columbia" (with a u) is more common, as in the Columbia River or District of Columbia. But the (Spanish-speaking) South American country uses the 'o' spelling.

Carbon's chemistry comes from three major factors:

(1) It forms four bonds readily. (2) It can form double- and triple-bonds readily. (3) It bonds strongly to itself in a configuration that allows it to form long chains.

(1) is satisfied by other elements in its column on the periodic table, but silicon (the next element down in its group) and the following members (germanium, tin, and lead) fail (2) and increasingly (3). Silicon will form chains, but is reluctant to form double bonds; in general, double bonds become weaker for atoms further down the table. Silicon (and silicone, chains of Si-O bonds) are the most promising analogs but they have a lot of problems.

(2) is satisfied by most other light nonmetals, but those nonmetals mostly fail (3) and almost all fail (1).

The highly-electronegative oxygen doesn't really want to bond with itself (failing 3) and almost always takes a -2 oxidation state (failing 1).

Nitrogen actually does form four-bond atoms decently often (most notably the ammonium ion), so it somewhat satisfies (1) to some extent, but is so eager to form N2 that most polynitrogen compounds are wildly unstable to the point that "nitro" is a term even laypeople know is associated with explosives (failing 3).

Boron can form three bonds, allowing some of the complexity of (1), and will form nice polyboron compounds (3), but doesn't like forming double bonds (failing 2), and the bonds in boranes are so weak that they're mostly quite reactive (weakening 3).

Sulfur will form polysulfur chains (the most common form is an eight-membered ring), but sulfur (like its cousin oxygen) usually doesn't form more than two bonds except with extremely electronegative partners (like its effective total bond order of 3 in sulfur dioxide or 4 in sulfur trioxide).

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There's another problem here too: life is likely to form out of common elements in its environment, and carbon is just WAY more common than the alternatives. The mechanisms by which the elements are formed in stars very strongly favors elements with even atomic numbers (because they are mostly formed from helium-4 nuclei) and the burning processes peak at carbon/oxygen, neon, magnesium, and silicon.

As a result, carbon is very common. It's the fourth most common element in the Universe (after hydrogen, helium, and oxygen), and ~an order of magnitude more common than any of the elements discussed above except oxygen (which has basically no analogs to carbon chemistry).

A typical human cell is on the order of 10 micrometers. If you need to bridge even 1 cm of that, you're bridging ~a thousand cell-widths. If you think of a cell as the somatic equivalent of a house in a city, that's the equivalent of an infrastructure project spanning (based on a quick count of the number of houses on each block in Oakland) the equivalent of around six miles, or roughly from downtown Oakland to El Cerrito on a map of the Bay (~4 BART stations). And you have to do that on a scale where precision manufacturing is incredibly hard, where you're dealing with extremely difficult problems of chemical synthesis, in a living body, without provoking the body's defense or repair mechanisms to stop you. And that's assuming you even know what you're trying to do, which requires an understanding of the machinery of those cells that we often don't have.