This project studies a new mission concept for planetary exploration, based on the deployment of a large number of small spherical mobile robots over vast areas of a planet’s surface and subsurface, including structures such as caves
Tag: science
Untrioctium
the heaviest element possible, without violating relativity. any element with an atomic number of greater than 138 would require 1s electrons to be traveling faster than c, and as such would not have stable electron orbitals.
Multiverse
you don’t need exotic theories to conjure multiverses. standard cosmology postulates that all possible quantum states (10^10^150), or world histories, actually play out. therefore, elvis is still alive (somewhere).
2007-01-28:
nice visualization of the multiverse.
2009-01-22: galaxy clusters racing at up to 1000 km / s – far faster than our best understanding of cosmology allows. Stranger still, every cluster seems to be rushing toward a small patch of sky between the constellations of Centaurus and Vela.
2012-01-23:
Recent theoretical works have shown that matter swapping between 2 parallel braneworlds could occur under the influence of magnetic vector potentials. In our visible world, galactic magnetism possibly produces a huge magnetic potential. As a consequence, this paper discusses the possibility to observe neutron disappearance into another braneworld in certain circumstances. The setup under consideration involves stored ultracold neutrons – in a vessel – which should exhibit a non-zero probability p to disappear into an invisible brane at each wall collision. An upper limit of p is assessed based on available experimental results. This value is then used to constrain the parameters of the theoretical model. Possible improvements of the experiments are discussed, including enhanced stimulated swapping by artificial means. The leap from our universe to another is theoretically possible. And the technology to test the idea is available today
that experiment sounds like nobel prize material.
2013-04-03: as good as any (perhaps even on the better side) episode of minutephysics
2015-05-28:
many physicists have come to doubt the very logic of nature’s laws. Increasingly, they worry that our universe might just be a random, rather bizarre permutation among uncountable other possible universes — an effective dead end in the quest for a coherent theory of nature
2015-08-11:
“A lot of people claim that you can never empirically test a claim like the multiverse because by definition you can only see what’s in our universe. But I think that’s much too quick.” Certain fundamental laws, which we can empirically prove in our own universe, might mathematically predict the existence of other universes. These laws would therefore be indirect, but compelling evidence of the existence of other universes.
Scientific Genealogy
As an aside, there seems to be lots of academic genealogy projects. Of particular note is the neuroscience family tree. That computer scientists through mathematicians can lead their ancestry back to Leibniz isn’t that strange. But many neuroscientists also tie into the above network. Eric Kandel has Otto Mencke in his background, and Herman von Helmholtz has neuroscience and psychology descendants beside his physics and philosophy descendants.
It would be fun to actually merge all these academic graphs to see the big picture, but I will likely need a better layout program to handle it. The philosophers are <8000 and yEd handles them well, but the philosopher graph is just 8% of the mathematician graph.
see also Genealogy of Influence a visualization of the connections between the most influential writers, artists, philosophers, scientists, and mathematicians of Western culture
Modeling electrons
There can be 1000s of electrons moving around the nuclei of a molecule–far too many for their distribution in the molecule to be determined exactly even with modern supercomputers. But during the 1950s, scientists realized that they could, in principle, use only a pair of electrons to represent any number of electrons accurately. That quest has been a ‘holy grail’ of theoretical chemistry for more than 50 years. He has developed and demonstrated the accuracy of an innovative approach that brings him much closer to the holy grail than anyone has managed to get before
i wonder if the increased accuracy will benefit the various protein folding projects?
Rendering Effective Route Maps
this is a classic paper for routing: exaggerate the details to make them stand out, and compress long stretches.
Route maps, which depict a path from one location to another, have emerged as one of the most popular applications on the Web. Current computer-generated route maps, however, are often very difficult to use. In this paper we present a set of cartographic generalization techniques specifically designed to improve the usability of route maps. Our generalization techniques are based both on cognitive psychology research studying how route maps are used and on an analysis of the generalizations commonly found in handdrawn route maps. We describe algorithmic implementations of these generalization techniques within LineDrive, a real-time system for automatically designing and rendering route maps. Feedback from over 2200 users indicates that almost all believe LineDrive maps are preferable to using standard computer-generated route maps alone.
Toxoplasma gondii
this critter is super-prevalent, and responsible for a huge number of personality changes, the rate of boys/girls in births, and more
A Short History of Nearly Everything
this was an awesome book. even though it is a popular science book, i still learned a lot, like that there have been 30B species so far (lower bound)
Center for the New Europe
About time for a think tank like that, with all the nonsense in european policy.
Against Diamonds
Stupid kills. In this case, being uneducated about the various states of carbon
Adding to the pot-stirring that De Beers and others incited, a single page ad appeared in Variety a few months ago, paid for by the Kalahari Bushmen of Botswana, who were driven from their land by the government to make way for diamond mining. Their ad directly addressed DiCaprio, asking for help which then came in the form of several Survival International advocacy efforts.
2008-02-20: Finally a situation where the diamondoid surfaces warning sign makes sense.
Designer Wong makes engagement rings that can kill you. The razor-sharp diamond point is set into the ring so it can’t get knocked out when you smash someone’s face in, and the edges of the ring are really soft so it won’t cut into your skin during the pounding. It’s romantic because it means, “Will you marry me” but it also means, “I can’t always be there to protect you so if some jerk won’t stop bothering you, puncture him with this.” The diamond sharp edge will also cut skin down to the bone (with a minimum 1 karat stone – but the larger the better). Or it may simply be used to tag hard surfaces, like cars and windows for S.O.S. messages or that last will and estimate when pen or paper (or lawyers) aren’t conveniently around.

2008-06-16: Extremely cheap diamonds will hopefully do away with the “diamonds are forever” crap this country’s brides are infatuated with.
“This is a virtual diamond mine. If we were in Africa, we’d have barbed wire, security guards and watch towers. We can’t do that in Massachusetts.”
2008-10-27: Can’t wait for those to be done in volume, and the retarded engagement ring industry to die.
The most exciting aspect of this new annealing process is the unlimited size of the crystals that can be treated. The breakthrough will allow kilocarat diamonds of high optical quality
2012-09-18: That’s a lot of engagement rings. Diamond rings are now even more broadcasting your status as an idiot to the world.
Russia has just declassified news that will shake world gem markets to their core: the discovery of a vast new diamond field containing “trillions of carats,” enough to supply global markets for another 3 ka.
2015-01-07: No more Diamonds, with the exception of the engagement ring nonsense, of course.
Even my own diamond-business owning, non-millennial father is turning away from jewelry when it comes to gift giving. Sure, he’s made my mom a handful of statement pieces over the years, but at the same price point, he’s more likely to gift something that has actual purpose, aside from aesthetic value. The last few birthdays and Christmases have yielded vacation getaways, iPhones of every generation, even a smart home thermostat. What hasn’t shown up under the Christmas tree in the last 5 years? Diamond anything.
2015-03-18: Diamond scams
We were called hip-pocketers, because we lived from one deal to the next: Your business could fit in the wallet in your pocket. You bought a used Rolex at a pawnshop for $1000 from the kid who’s just paid $500 for it, hurried it over to your watch guy to hit it on the wheel and make it look new, replaced the old worn buckle with a South American counterfeit for $50, and resold it to your friend who owned the jewelry store a few blocks over for $2200, $2275 if she wanted a counterfeit leather box. She could retail it the same day for $3500. We “worked the float” back then, in the ’80s and ’90s—that meant the few days you had between when you paid for something with a check and the check actually hit your bank account. If you flipped the gold you’d bought with a check the same day, you had a few days of free money. Of course, you tried to make money on every deal, but often you were moving so fast that you had to lose money here and there, waiting for the bigger score that ought to come if you just kept hustling fast enough.
On the icky details of this criminal hustle
I’ll tell you how it’s done. Let’s say you have a 14-karat gold ring that weighs 15 grams. First you weigh it and show the customer that it’s 15 grams. “Now we multiply that by 14 for 14 karat and divide it by 24 for 24 karat, which is what it would be if it were 100% gold,” you explain to the seller. “That gives us the price for your 14-karat gold. Multiply that by 15, for 15 grams. Now, 14 karat is 56% gold and 44% base metal, which burns off at the smelter, so we multiply that by 0.56. Finally, we deduct 10% for the smelter, and 15% for my profit. Most gold buyers will charge you 20 or 25%, which is a reasonable profit margin, but we do such high quantity of gold-buying here that we can afford very low margins. That gives us a final figure of…” You get the picture. The customer’s ring is worth $280 in real gold value. But you just offered $120, with a seemingly sound mathematical justification. And you’ve left yourself plenty of wiggle room if they want to haggle your profit down from 15% to 10% or even 7.5%. The real key to this scam is that you’ve deducted for the impurity of 14 karat not 1x but 2x: first, when you calculated the per-gram price and again when you “deduct for the base metal.”
2016-06-07: Time for a 1M carat synthetic diamond to end this silliness
Lesedi La Rona could, if skillfully cut, yield an even larger stone—the largest polished diamond in history. He described the Lesedi La Rona, a single piece of rough some 3 ga old, as “almost ungraspable.”
2023-05-06: It’s happening. Too slowly because people are dumb, but still.
33% of all engagement rings with center stones purchased last year were created in a lab. That’s 2x the number from 2020. As the technology to make lab-grown diamonds has improved, production has increased and retail prices are falling. Their growing popularity, especially among younger consumers, has caught the attention of jewelers and watchmakers — and is challenging traditional diamonds that are mined from the earth.