On Monday, engineers positioned submarine robots that will try to shear off a collapsed 21-inch riser pipe with a razorlike wire studded with bits of industrial diamonds. If that is achieved, officials will need at least a couple of days to position a domelike cap over the blowout preventer [The New  York Times].

The cap is called the lower marine riser package (LMRP), and—stop me if you’ve heard this one—it’s never been tested at the depth of 5,000 feet, so BP has no idea whether it will work. The previous version of the containment dome had the same goal: establishing a seal on the seal and piping the oil up to a tanker on the surface. But because of buildup on the dome, that first attempt in early May was unsuccessful.

Meanwhile, the disastrous numbers just get worse. The oil spill is now the worst in U.S. history and increasing in size by the day. Yesterday wind patterns from the south threatened to carry more oil toward Mississippi and Alabama. The fishing ban has been extended to nearly 62,000 square miles, or about a quarter of the Gulf.

And as more people clamor for President Obama to step in and do more, given BP’s ineptitude, it’s become clear that there’s not a lot he can do.

The public anger and frustration over the spill poses a major domestic challenge for Obama, who has been forced to admit publicly that the U.S. government and military do not have the technology to plug the leaking well and must leave this to BP and its private industry partners [MSNBC].

While Washington can’t stop the oil, one thing they can do is question and investigate the leaders of the companies involved. Today Obama meets with the leaders of the commission he formed two weeks ago to investigate the spill. And Eric Holder, the attorney general, is traveling to meet leaders and government prosecutors in the region, another hint that the Obama Administration is considering a criminal investigation of the Deepwater Horizon incident.

The opening of a criminal investigation or civil action against BP, if either were to happen, would create the unusual situation of the federal government weighing charges against a company that it is simultaneously depending on for the most critical elements of the response to the record oil spill [Washington Post].

Last week’s top kill maneuver failed, BP says, because the pressure of the gushing oil and gas was too intense to overcome with injections of heavy mud. As with that top kill effort, we’re now left with not much to do but hope for the best for BP’s current containment attempt. If it doesn’t work, there might not be another “now what?” other than waiting until drills finish the relief wells in August (supposing their work isn’t interrupted by hurricane season or some other new calamity).

Recent posts on the Gulf oil spill:
80beats: This Hurricane Season Looks Rough, And What If One Hits the Oil Spill?
80beats: We Did the Math: BP Oil Spill Is Now Worse Than the Exxon Valdez
80beats: “Top Kill” Operation Is Under Way in Attempt to Stop Gulf Oil Leak
80beats: Scientists Say Gulf Spill Is Way Worse Than Estimated. How’d We Get It So Wrong?
80beats: 5 Offshore Oil Hotspots Beyond the Gulf That Could Boom—Or Go Boom

Image: U.S. Coast Guard

Photo: flickr/CavinB

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According to new research, collectors can avoid purchasing a faked bottle of an old vintage by running the wine through a “bomb pulse” test, which uses the radioactive material present in air to date the wine. The system is accurate enough, say scientists, to date your wine’s vintage up to a year of its production–so that a collector can be certain, for example, that a Chateau Lafite Rothschild 1982 isn’t actually a child of the aughts.

Speaking at the American Chemical Society meeting in San Francisco, chemist Graham Jones said that prior to the 1940s, all the carbon-14 in the Earth’s biosphere was produced by cosmic rays and nitrogen in the upper atmosphere. However, from the late 1940s to 1963, atomic bomb tests released radioactive material and significantly increased the amount of carbon-14 in the atmosphere. Ever since the atomic tests stopped in ‘63, this “bomb-pulse” C-14 has been gradually diluted by the CO2 formed by the burning of fossil fuels.

What’s all this got to do with vino? Well, when the grapes on the vine took in this CO2, they also ingested the bomb pulse C-14 and in the process, transferred minute, harmless qualities of the radioactive carbon to their wine.

PhysOrg explains:

The scientists used a highly-sensitive analytical device called an accelerator mass spectrometer to determine the C-14 levels in the alcohol components of 20 Australian red wines with vintages from 1958 to 1997 and then compared these measurements to the radioactivity levels of known atmospheric samples. They found that the method could reliably determine the vintage of wines to within the vintage year.

So much like carbon dating helps determine the age of prehistoric fossils and artifacts, the lingering traces of bomb-pulse C-14 present in wine could help determine its vintage. The scientists are hopeful that this technique will help prevent fraud in the $3 billion global wine market.

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Image:Wikimedia

Seeking to study spatial learning during puberty, the team devised a relatively complex task (at least for a mouse) that requires learning how to avoid a moving platform that delivers a very mild shock [TIME]. While the prepubescent mice picked up on what to avoid pretty quickly, as did adult mice, pubescent mice took considerably longer to figure it out. The key to these differences was what study leader Sheryl Smith saw in the brains of these mice.

Building on their own previous work that showed a spike in the number of chemical receptors in the brains of adolescent mice, Smith and her colleagues looked for that effect in the hippocampus, the brain region associated with learning. Sure enough, pubertal mice had seven times as many of the receptors as infant mice. In adulthood, the number of these receptors fell back to an intermediate level [New Scientist]. Smith thinks those extra receptors could be inhibiting learning by interfering with activity in the hippocampus.

While people often complain of being too stressed to learn, you need a least a little bit of pressure, and it seems the pubescent mice weren’t stressed enough. When Smith’s team gave the mice a stress steroid called THP, that reduced the learning problems. Typically THP is produced in response to stress, and has a calming influence. But in the strange brains of the pubescent mice, THP did the opposite—it slightly increased their stress levels and closed the learning gap.

It’s too early to say how well this might work on humans, since our teenagers, compared to pubescent mice, are an even more complex puzzle. It’s possible that “they’re just being difficult, it’s their hormones, or they’re doing it on purpose,” she said. “There are so many things going on in humans that we wanted to break it down in a mouse study where we could look at what’s going on in the brain” [HealthDay News].

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Image: Wikimedia Commons