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EcosystemsEmpty Nets
New research has begun challenging long-held assumptions about the consequences for fish stocks of harvesting the biggest fish first.
By Janet Raloff -
MathMean Median Surprise
Calculations of means and medians lead to surprising sequences of numbers.
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HumansLetters from the May 28, 2005, issue of Science News
Hunger pangs I was interested to read about factors influencing the “hunger hormone’s”—ghrelin’s—effectiveness (“Still Hungry?” SN: 4/2/05, p. 216). One factor not considered but seemingly very significant is physical activity. I suggest that it is more useful to understand and encourage the positive effects of physical activity on overall well-being than to develop new drugs […]
By Science News -
HumansFrom the May 25, 1935, issue
A yacht's air resistance-reducing mast, plants that absorb poison, and new fossils from Patagonia.