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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. Read “Summer Arctic melt among worst ever.” GENES & CELLS Natural killer cells are caught in the act of feeding poison pills […]

Science Future for October 8, 2011

October 16Comet Elenin comes its closest to Earth and may be visible with binoculars.