Shark fins are on sale in a Hong Kong market. When its fins are removed, the shark dies. Conservation campaigners, regulators, and scientists are now coordinating efforts to stem the exploitation of sharks for their fins. Also in this issue of Science News
for October 12, 2002: brain-scan data show that the brains of children diagnosed with attention-deficit hyperactivity disorder are slightly smaller than those of their peers who are free of psychiatric disorders, a study of leghorn chickens has linked hormone concentrations in a hen's eggs to her rank in the pecking order, a gene variant reduces people's response to the stress hormone cortisol, and people with the variant are less likely to have risk factors for heart disease and diabetes, and more.
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