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Ancient Rome forbade downtown traffic in day

Roman road congestion is as enduring as the Eternal City.

Letters

Lowdown on Earth’s heat “Science Stats” (SN: 8/27/11, p. 4) understates the power Earth radiates into space and mistakenly suggests that Earth radiates more energy from internal sources than it receives from the sun. The total (44 trillion watts) shown in your diagram must represent only the minuscule percentage (about 0.02 percent) from internal energy […]

SN Online

ENVIRONMENT Plastics sloughed off clothing can pollute coastlines. See “Synthetic lint ends up in oceans.” G.D. Rak et al/PLoS Biology 2011 Arctic sea ice this year was near its smallest extent on record.