If that were true, why does the global atmospheric CO2 concentration (whilst obviously increasing year after year) have a seasonal oscillation with its phase matched to the growing season of the northern hemisphere (which has an excess of forests rather than ocean)?

It might be the production of carbon-rich soil that you're overlooking.

No, it can also apply if the seller has more customers than addresses, or if statistical analysis can recognise that the seller is routinely aggregating that set of wallets together in order to spend the income (say, buying a boat or a trolly of groceries).

And how do you get money into your contraband-wallets, without it being traceable back to you?

So not true.

If you buy contraband once, you can immediately identify a large number of other wallets guilty of the same purchase, and you can trace each one's transaction history until they interacted with a legitimate business, and then you just subpoena for shipping addresses.

Bitcoin is a system of numbered bank accounts with public transaction histories. Just because the accounts aren't listed by name doesn't mean it wouldn't be trivial for accountants to trace them back to people. (You can only be anonymous if none of your interactions are with any parties who could ever compromise you, in which case it isn't very useful as an alternative currency.)

TFA is about northern white rhinos, which are critically endangered by heavy poaching.

So actually for some species, human-caused extinction could be avoided simply by such artificial reproduction techniques. In fact this may be the only way, since there are now so few of these rhinos left that we don't have time to try more experiments to find out how to encourage breeding. (We certainly can't figure it out by observing wild populations, since we've poached those to extinction already.)

Also, if we had a technology to reproduce these animals at a much faster rate than is natural, then poachers (who are using other recent technology to eliminate these animals at a much faster rate than is natural) would cease to be a problem. Posters above have already made the case for preservation by domestication, but in this case (despite all our attempts to eradicate the ridiculous belief that keratin obtains some mysterious power when taken from some phallic icon) clearly the economy already does have a use for these rhinos (and lack of reproductive technology is the main obstacle to farming them, so we would not even need to modify these animals to be more appealing). Thus this technology could easily pay back its own development, even without considering the spinoffs that such iPSC germ cell research would be anticipated to advance human medicine.

But it's still valid for you to emphasise the ecosystem (or would be if you weren't unconstructive). Even if not applicable to these particular animals, habitat encroachment is certainly becoming the prime factor in the incredible rate of current extinctions. This is devastating, since our understanding of DNA is only just advancing to the point that we recognise what a wealth of information is being lost with diminishing biodiversity, it's like burning the library that stores millions of years of engineering insights which can guide biotechnology (for example, most pharmaceuticals even today are discovered, not invented, and their processes of chemical synthesis are similarly not only inspired by biology but often too difficult or more expensive to synthesis except through harvesting natural components), not to mention the encoded historical record (without which our understanding of our past must always have larger gaps), and abstract value (which only grows as are progressively less preoccuppied labouring for bare necessities). Hence the huge importance that we curb the raw growth (rather than development) of the economy, like we are finally only beginning to do in the issue of carbon. And that we halt this planet's human population growth (and it looks like being a long time before we have somewhere else to populate): we educate women (and quit forbidding family-planning tools while we're at it) and do more to eliminate extreme poverty (rather than using the reality that a portion of funds will leak and miss our target as an excuse to not contribute to the target at all). We generally need to adopt a more progressive stance, and quit bashing science, decora. Each extinction may cause a cascade. Who knows what other (perhaps little-known) species may be indirectly dependent on the existence on these rhinos for example. Certainly there will be species-specific parasites that directly depend on the host, which may not be as appealing but still embody potentially-useful knowledge. We only recently realised how organisms unique to a panda's gut are relevant to the development of biofuels.

(didn't really intend anonymous)

That's 14 milligrams, not 13 micrograms. And it may not be negligible if the mass is ejected directionally.

Google "1 kW / c / 250kg". The momentum of 1kW of photons could accelerate the Pioneer by 10^-8 ms^-2, if it were all emitted in one direction.

The anomalous acceleration we want to explain is about an order of magnitude smaller than this figure. Hence, TFA.

The problem with the /. system is that it's one-size-fits-all. A better system would expose the raw moderation data to the client.

For example, consider a post that is highly informed, reasoned and articulated but expresses some viewpoint which herd sensibilities oppose: So it gets 10 positive and 10 negative mods, and the current system therefore buries it amongst the least significant posts (the system instead elevates a swathe of highly similar posts expressing the majority viewpoint, ultimately just reinforcing one potentially narrow mindset). Unfortunately, the posts I most want to read are the ones that expose me to viewpoints outside of my own. I want to preferentially read the posts that generated a strong-yet-controversial reaction (e.g., ranking posts more according to sum of absoluted mods, rather than the sum of signed mods).

But this is only one alternative ranking scheme. For example, I also want to cancel out the tendency to arbitrarily favour the earliest posts over ones contributed a couple hours later, so I might rank according to rate-of-moderation (calculated using timestamp from the post) instead of accumulated total. Or somebody might develop a Last.FM (librefm) style model, which analyses which other mods tend to agree with the mods who favour your favourite posts, and therefore recommends the posts each of us will personally most enjoy seeing. Or, some people might prefer to build their own trust networks, and preferentially read posts recommended by moderators endorsed by authorities they respect. (For example, on a cutting edge science topic, I'd like to first hear from people who have actually studied related fields, leaving the general sci-fi reference jokes and alternate theory speculations further down the page.)

We have to recognise that /. is already exceptionally good compared to most forums in the world. Try discussing the physics of climate change on physicsforums and you very quickly see the downsides of having some fixed set of "expert" moderators imposed from above (fallibility, autocracy, censorship, etc). The key at /. is automation and democratisation. But it could go further than that, by also democratising the post ranking scheme, and the site administrators only need to facilitate that. (Just like the users themselves perform the labour of eliminating spam from /., so too the users could burden responsibility to evolve superior ranking schemes.)