Tag: science

An independent study of climate suggests the climate has warmed 0.9 degrees Celsius since 1950

2:24 am

An independent study of land temperature records by a team led by Richard Muller concludes that the climate has warmed 0.9 degrees Celsius since 1950.

Does this prove that human-caused global warming is happening? No, not even close. The study has not yet been peer-reviewed, and others have not yet been able to duplicate its results. Also, a warming trending since 1950 can be caused many things, and it is only a very short snapshot of a vastly longer movie.

Nonetheless, it does appear that real science (open data, honest analysis, and a willingness to entertain opposing viewpoints) is beginning to return to the field of climate research. For this we should celebrate.

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Ancient Greek ships shipped more than just wine

5:28 pm

New data has shown that ancient Greek merchant ships transported a wide assortment of goods, not just wine.

What is interesting about this story is how it punctures a hole in an assumption too many archeologists have been making about the amphorae, the standard shipping container of the ancient Mediterranean:

Amphorae have been found in their thousands in wrecks all over the Mediterranean Sea. Some of them contain residues of food, such as olive pits and fish bones, but the vast majority of them are discovered empty and unmarked. Foley says historians tend to assume that these containers were used mainly to transport wine — in a survey of 27 peer-reviewed studies describing 5,860 amphorae, he found that 95% of the jars were described as having carried the beverage.

The new research found evidence for many things besides wine, illustrating again the dangers of assuming anything in science.

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An archeology discovery in Africa suggests that Stone Age humans had an understanding of basic chemistry

9:15 pm

An archeology discovery in Africa suggests that Stone Age humans had an understanding of some basic but complicated chemistry.

Archaeologists have found evidence that, as long ago as 100,000 years, people used a specific recipe to create a mixture based on the iron-rich ochre pigment. The findings, published in the journal Science, “push back by 20,000 or 30,000 years” the evidence for when Homo sapiens evolved complex cognition, says Christopher Henshilwood of the universities of Bergen in Norway and Witwatersrand in Johannesburg, South Africa, who led the work. “This isn’t just a chance mixture, it is early chemistry. It suggests conceptual and probably cognitive abilities which are the equivalent of modern humans,” he says.

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Rough Terrain

10:21 pm

The Dawn scientists have released another spectacular image of the south polar mountain on Vesta whose relative size is three times that of Mount Everest. More information about the image can be found here. From the caption:

The peak of Vesta’s south pole mountain, seen in the center of the image, rises about 13 miles (22 kilometers) above the average height of the surrounding terrain. Another impressive structure is a large scarp, a cliff with a steep slope, on the right side of this image. The scarp bounds part of the south polar depression, and the Dawn team’s scientists believe features around its base are probably the result of landslides.

Mountain on Vesta

It appears the light gravity on Vesta allows for the formation of extreme topology.

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New cave discoveries in the western Caucasus of Russia

11:46 am

From an email sent out by Ukrainian caver Alexander Klimchouk, received today:

Pavel Rud’ko of Krasnoyarsk (Rissia, Siberia) has reported the success of the recent expedition of Krasnoyarsk cavers to the Sarma Cave, Arabika Massif, Western Caucasus. The cave, previously explored by cavers from Krasnoyarsk and Irkutsk to -1570 m, has now been made almost 200 m deeper, to reach depth of -1760m and become the second deepest cave in the world.

The expedition led by Pavel Rud’ko has been carried out between September 1st – October 7th, 2011. The main branch has been pushed to -1760 m after breaking through a narrow meander at the old bottom. Many side and ascending passages in other parts of the cave have been also explored. The expedition performed systematic temperature measurements, and speleobiological and microbiological sampling.

With its new depth figure, Sarma surpassed the Illjuzia-Mezhonnogo-Snezhnaya system (-1753 m), located in the nearby Bzybsky Massif, and became the second deepest cave in the world, following Krubera Cave (-2191 m) located in the same massif. Thus, the western Caucasus now hosts three deepest caves in the worlds, two of them in Arabika Massif and one in Bzybsky Massif.

Some details of geology, hydrogeology and cave locations of Arabika can be found here. [pdf]

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