Uncategorized
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19802
Among estrogenic pollutants, by far the worst offender is 17-alpha ethinyl estradiol, the most common estrogen in oral contraceptives used by tens of millions of women. This synthetic steroid is of necessity non-biodegradable, at least by human liver. Otherwise, it would not work as a pill. Joel BrindCity University of New YorkNew York, N.Y.
- Earth
Traces of Trouble
Scientists and engineers are investigating how to stem the flow of naturally-occurring and synthetic estrogens that, when released from waste water treatment plants and livestock operations, can harm aquatic life.
- Math
Ancient Islamic Penrose Tiles
Medieval Islamic artisans developed a process for creating elaborate, nonrepeating patterns now associated with Penrose tiles.
