Methane Cycle on Titan Looks to Be Confirmed Through FOG

Look! Titan has fog at the south pole! All of those bright sparkly reddish white patches are fog banks hanging out at the surface in Titan's late southern summer.

I first realized this a year ago, but it took me until now to finally have the time to be able to put all of the pieces together into a scientific paper that is convincing enough that I can now go up to any person in the street and say: Titan has fog at the south pole!

I will admit that the average person in the street is likely to say hmph. Or yawn. Or ask where Titan is. So let me tell you why finding fog at the south pole of Titan has been the scientific highlight of my summer.

Titan is the only place in the solar system other than the earth that appears to have large quantities of liquid sitting on the surface. At both the north and south poles we see large lakes of something dark. Oddly, though, we don’t actually know what that dark stuff is. At least some of it must certainly be ethane (that’s C2H6, for all of you who have forgotten your high school chemistry). Ethane slowly drips out of the sky on Titan, sort of like soot after a fire, only liquid soot in this case. Over geological time, big ponds of ethane could accumulate into the things that look like lakes on Titan. Odd as they sound, big lakes of liquid ethane are, at least to me, the least interesting possibility. They are the least interesting because ethane is a one way street. Once the liquid ethane is on the ground, it can’t evaporate and is there pretty much forever, unless it somehow sinks into the interior.

Why does all of that ethane drip out of the sky? Because sunlight breaks down methane (CH4) to form ethane much the same way it breaks down car exhaust fumes to form smog in big cities. There’s plenty of methane in the atmosphere, so the supply of ethane is near endless. The dripping will not end soon.

But the methane is where all of the potential action is. Methane is to Titan what water is to the earth. It’s a common component in the atmosphere and, at the temperature of Titan, it can exist in solid, liquid, or gas form. Like water on the earth, it forms clouds in the sky. Like water on the earth, it probably even forms rain. But what we don’t know is whether or not that rain makes it to the surface and pools into ponds or streams or lakes which then evaporate back into the atmosphere to start the cycle over again. In short, we don’t know if Titan has an active methane atmosphere-surface hydrological cycle analogous to the water atmosphere-surface hydrological cycle on the earth.

Until now.

Because there is fog.

Hat tip to Mike Brown's Planets.

Oh! But they ARE!

They're remaking Red Dawn.

Wow.

Words. They fail.

A Photo By a Friend

A friend of mine, Shane Thomas, took this out near the NASA site in Las Cruces, NM.

DARPA Wants Synthetic Telepathy

Forget the battlefield radios, the combat PDAs or even infantry hand signals. When the soldiers of the future want to communicate, they’ll read each other’s minds.

At least, that’s the hope of researchers at the Pentagon’s mad-science division Darpa. The agency’s budget for the next fiscal year includes $4 million to start up a program called Silent Talk. The goal is to “allow user-to-user communication on the battlefield without the use of vocalized speech through analysis of neural signals.” That’s on top of the $4 million the Army handed out last year to the University of California to investigate the potential for computer-mediated telepathy.

Before being vocalized, speech exists as word-specific neural signals in the mind. Darpa wants to develop technology that would detect these signals of “pre-speech,” analyze them, and then transmit the statement to an intended interlocutor. Darpa plans to use EEG to read the brain waves. It’s a technique they’re also testing in a project to devise mind-reading binoculars that alert soldiers to threats faster the conscious mind can process them.

The project has three major goals, according to Darpa. First, try to map a person’s EEG patterns to his or her individual words. Then, see if those patterns are generalizable — if everyone has similar patterns. Last, “construct a fieldable pre-prototype that would decode the signal and transmit over a limited range.”

Wow. Think about the possibilities!

Vindhyan Fossils Show Cambrian Forms...1 *BILLION* Years Earlier

The controversial “Cambrian” fossils of the Vindhyan are real but more than a billion years older

1. Stefan Bengtsona,b,1,
2. Veneta Belivanovaa,
3. Birger Rasmussenc and
4. Martin Whitehouseb,d

-Author Affiliations

1.
aDepartment of Palaeozoology and
2.
dLaboratory for Isotope Geology, Swedish Museum of Natural History, SE-104 05 Stockholm, Sweden;
3.
bNordic Center for Earth Evolution, SE-104 05 Stockholm, Sweden; and
4.
cDepartment of Applied Geology, Curtin University of Technology, Perth, WA 6845, Australia

1.

Edited by James P. Kennett, University of California, Santa Barbara, CA, and approved March 24, 2009 (received for review December 11, 2008)

Abstract

The age of the Vindhyan sedimentary basin in central India is controversial, because geochronology indicating early Proterozoic ages clashes with reports of Cambrian fossils. We present here an integrated paleontologic–geochronologic investigation to resolve this conundrum. New sampling of Lower Vindhyan phosphoritic stromatolitic dolomites from the northern flank of the Vindhyans confirms the presence of fossils most closely resembling those found elsewhere in Cambrian deposits: annulated tubes, embryo-like globules with polygonal surface pattern, and filamentous and coccoidal microbial fabrics similar to Girvanella and Renalcis. None of the fossils, however, can be ascribed to uniquely Cambrian or Ediacaran taxa. Indeed, the embryo-like globules are not interpreted as fossils at all but as former gas bubbles trapped in mucus-rich cyanobacterial mats. Direct dating of the same fossiliferous phosphorite yielded a Pb–Pb isochron of 1,650 ± 89 (2σ) million years ago, confirming the Paleoproterozoic age of the fossils. New U–Pb geochronology of zircons from tuffaceous mudrocks in the Lower Vindhyan Porcellanite Formation on the southern flank of the Vindhyans give comparable ages. The Vindhyan phosphorites provide a window of 3-dimensionally preserved Paleoproterozoic fossils resembling filamentous and coccoidal cyanobacteria and filamentous eukaryotic algae, as well as problematic forms. Like Neoproterozoic phosphorites a billion years later, the Vindhyan deposits offer important new insights into the nature and diversity of life, and in particular, the early evolution of multicellular eukaryotes.

Not at work so I can't look at the paper pdf...but what they are claiming is true. Or my understanding of it that is...

Whoa.

UPDATE:

There are specific fossils they looked at. None of them are animal life, so no Burgess Shale critters here. There are gas bubbles found from cyanobacterial mats (gas got trapped in a mat and mud covered it) and what look like tubes secreted by specific kinds of algae (filamentous algae such as Spirogyra). There are other fossils as well, but they are not examined in detail. Chambalia (or soemthing like it) also makes an appearance. The age is rock solid though (sorry for the bad pun). This stuff is a billion years older and very similar to Cambrian equivalent taxa, but not necessarily actually Cambrian taxa.

Holy Martian Cow