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When to Change Sex
A research team contends that animals that routinely change sex, even those prompted by mate loss or other social cues, tend to do so when they reach 72 percent of their maximum size.
- Math
Splitting Terrorist Cells
How can you tell if enough members of a terrorist cell have been captured or killed so there’s a high probability that the cell can no longer carry out an attack? A mathematical model of terrorist organizations might provide some clues. The question is what sort of mathematical model would work best. In this hypothetical […]
- Health & Medicine
Age-related anemia hastens death
People who develop low concentrations of iron-containing hemoglobin in their blood as they get older are at elevated risk for serious medical problems and early death.
