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Amongst the myriad secrets lost to the ancient world was the formula for Roman concrete: uncannily more robust than today’s mixtures, there are ancient Roman seawalls and harbor piers, built two millennia ago, that are still standing today, whereas modern concrete would require maintenance every few decades under the same aquatic conditions. But now, a new study may have uncovered how the ancients made their long-lasting concrete, suggesting that the secret of this forgotten formula may not truly be set in stone.
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For the third time this winter, temperatures in the Arctic are forecast to rise to near freezing, due to a massive storm that is brewing in the North Atlantic. The continued dumping of warm, moist air into the Arctic, along with the overall rise of global temperatures and a warm Arctic winter, is hampering the region’s ability to generate new sea ice cover, already at a record low since the season started last September.
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The National Atmospheric and Oceanic Administration has released its annual Arctic Report Card, assessing the state of the climate above 60º north, and region’s grades are not good: higher temperatures, lower snow and ice cover, and alarming biological activity marred the report’s findings.
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