Posts Tagged ‘dipterans’


3 December 2010
Or maybe just a gravid female Mono Lake Brine Shrimp, Artemia monica.
heard if you go into the bathroom with a candle, turn the lights off, and whisper “reversed chirality” into the mirror seventy-three times you can actually *see* the shadow biosphere”

Well, I heard that arsenic makes you fat. And horny.

“Well, I heard that Tesla invented ununquadium-based life, you know, and hid it in a mountain in Colorado, and,”

I heard that Saturn’s moon Titan is made of liquid unicorns!”

Sorry.  The universe is a pretty crazy place, our own little stony clot of matter being no exception, and as things go, life is, really.

As I’m sure you have already heard, we are made of star stuff, and this connection is evident in how our own elemental makeup broadly mirrors that of the Earth and the Universe as a whole.  The six elements commonly regarded as the primary building blocks of life, hydrogen, oxygen, carbon, phosphorus, sulfur and nitrogen are the 1st, 3rd, 10th, 13th, 15th and 32nd most abundant elements in the Earth’s crust.  Other biologically important elements (e.g. iron, calcium, magnesium, sodium, potasium) largely round out the top 10 and the relative paucity of nitrogen in the crust is more than made up for by its superabundance in the atmosphere (thanks diazotrophs, we owe you one)

Stepping back a bit, CHNOPS and FeCaMgNaK all rank in the top 20 in elemental abundance in the universe.

To put things into perspective, arsenic, the subject of some breathless reportage today, is quite a bit rarer in the universe.  It ranks 41st in abundance in the universe, just behind tellurium (number 40) and just ahead of freaking yttrium (number 42).  The same goes for our own planet in particular where arsenic ranks at 48th in abundance by mass percentage.

(Incidentally, I got thes figures from WolframAlpha the first time that I’ve actually been able to put that seemingly powerful tool to any sort of meaningful use.)

Not to rain on anyone’s arsenic alien parade but if Earth’s boring old vanilla non-shadow biosphere (the overwhelming bulk of it anyway) is any indication, if life exists elsewhere in the universe it seems pretty likely that its elemental composition will more or less reflect the overall composition of the universe. Pinning hopes on a relatively scare substance, arsenic, when the alternative, phosphorous is rather abundant seems misguided. Just sayin’


These new experiments
show some bacteria already adapted to a fairly chemically extreme environment might, maybe, incorporate arsenic into their biomolecules when subjected to fairly elaborate artificial laboratory conditions.  But making the leap that this tells us something about what life outside (or hidden deep inside) our planet might be like, is equivalent to saying that because humans can survive and thrive with artificial hips that we should expect to find martian metazoans with composite titanium and plastic skeletons.

None of which is to say that this new discovery is anything short of totally rad. It also shows the value of doggedly pursuing what might seem like wacky ideas. That the prediction of parallel properties of arsenic and phosphorus might have biological significance is the stuff of science fiction, so it’s pretty easy to see why the press has gotten a little, uh, carried away by all of this. Also, dude, the periodic table came to Mendeleev in a dream!

Somewhat lost in all of the coverage about this remarkable Mono monad is the fact that Mono Lake sports an entire ecosystem that is very bizarre, if decidedly terrestrial. But you don’t have to take my word for it:

There are no fish in Mono Lake—no frogs, no snakes, no pollywogs—nothing, in fact, that goes to make life desirable. Millions of wild ducks and sea-gulls swim about the surface, but no living thing exists under the surface, except a white feathery sort of worm, one half an inch long, which looks like a bit of white thread frayed out at the sides. If you dip up a gallon of water, you will get about fifteen thousand of these. They give to the water a sort of grayish-white appearance. Then there is a fly, which looks something like our house fly. These settle on the beach to eat the worms that wash ashore—and any time, you can see there a belt of flies an inch deep and six feet wide, and this belt extends clear around the lake—a belt of flies one hundred miles long. If you throw a stone among them, they swarm up so thick that they look dense, like a cloud. You can hold them under water as long as you please—they do not mind it—they are only proud of it. When you let them go, they pop up to the surface as dry as a patent office report, and walk off as unconcernedly as if they had been educated especially with a view to affording instructive entertainment to man in that particular way. Providence leaves nothing to go by chance. All things have their uses and their part and proper place in Nature’s economy: the ducks eat the flies—the flies eat the worms—the Indians eat all three—the wild cats eat the Indians—the white folks eat the wild cats—and thus all things are lovely. – Mark Twain, Roughing It 1872.

Be sure to click through for more mildly racist humor (lighten up, dude, it’s satire!)  Somehow, Twain overlooked that other strange component of the Mono 80s hair-rockers.

The usual suspects have great, sober, and thought-provoking coverage of the new discovery.

Anyway though, if you really want to know about extraterrestrials, there’s only one person to ask:

Successes and Failures of the Bushtit Hunting Expedition

27 April 2009

We saw plenty of bushtits, heard many more.  But failed our primary objective: locating a nest.  Blame multi-tasking.  The dog had his own agenda, primarily involving ground-squirrels.  And, I kept getting distracted by insects:

We did make some consolation discoveries at least.  Apparently the university is developing a special breed of semi-log horse.  Some limb-allometry project or something.  At least that’s what I heard.

We also managed to see some Killdeer sex so, you know, net plus overall.

The Idles of March

9 March 2009

geocheloneLooks like another slow march around these parts, well, more of dirge really.  Hence the carrion which seems as reasonable a metaphor for the rancid stench that’s been lately gathering on the blog (except for the jumping spider of course, that was delightful!)

Believe it or don’t there is some inspiration here actually: Dr. Vector’s hilarious post about the curious case of a snapping turtle carcass, which in turn was inspired by Darren’s incredibly informative tutorial on the fine art of skeletonization.

All of which recalled this large Geochelone (probably G. sulcata) tortoise I stumbled upon last year in the hills above greater Los Angeles.  How the poor bloke wound up like this I suppose I will never know although most likely somebody dumped it, hopefully post-mortem.  It would have been nice to salvage the thing (Matt’s suggestion of strapping it to the university van roof would have made for an entertaining spectacle), or perhaps I could have buried it on the spot and retrieved it later but, no such luck.

C’est la mort, I suppose.


Saturday Insexology – Valentine’s Day Edition

15 February 2009


Vector Analysis

26 March 2008


our new Drosera in action

Remember that old adage about flies and honey? Well, I suppose that explains Dr. Vector’s recent bizarre display of uncharacteristic magnanimity toward microecos. And I didn’t even have to bribe him with free tickets to “Robot Dinosaurs Gone Wild!”

Still, I have to say it’s rather unsettling when Matt effing Wedel compliments you. It’s like when someone comes up to you out of the blue and says “hey, nice shirt.” You just stand there staring back blankly, waiting for the “too bad you have such an ugly face” follow-up.

But seriously, I’m flattered. And the even better news is that I’ve worked out a 3.3 million dollar syndication contract with Univision. So put down your signs, get back to work, strike’s over baby!

Of course, I’m not at liberty to discuss the details of the deal but suffice to say there will be a lot more chicks in bikinis and fat guys dressed up like giant babies around here from now on… $ 3.3 million! That’s like easily 1000 euros right? Snap!


Moral of the story: “Honey works well for catching flies. But you just can’t beat a ginormous steaming, fetid pile of B.S.” QEFD

Dung flies

Stay tuned for a 2 year anniversarial spectacular in a couple of weeks. Meanwhile I might throw together an insightful, deeply-probibing post or two. So, uh, hold your breath.

I Knew I Had Smart Readers!

11 August 2007

Wow, 100% of respondents correctly guessed the ‘micromystery’ , unscientific polling suggests similar results by those who played at home…

Read the rest of this entry »

Dinnertime 2

24 July 2007


Because, I suppose, of my photography people have developed a picture of me as an expert entomophile. I often get queries and anecdotes on the order of, ‘I found this beetle in my sink, yesterday, it was black with red spots…’

In fact, short of a lecture or two in an invertebrate biology class way back at the turn of the century, I have very little formal education in the ways of terrestrial arthropods.

Of course, you can learn far more about arthropods simply by watching them, than you can from a thousand lectures. Unfortunately, I must admit that I didn’t really pay much attention until relatively recently. Read the rest of this entry »