Polygamy (polyandry & polygyny): Yes or No?

Serial Monogamy as Polygyny or Polyandry?

Applications of sexual selection theory to humans lead us to expect that because of mammalian sex differences in obligate parental investment there will be gender differences in fitness variances, and males will benefit more than females from multiple mates. Recent theoretical work in behavioral ecology suggests reality is more complex. In this paper, focused on humans, predictions are derived ...

Genetically Modified Food: Yes or No?

radical iort, yes or no?

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Pheochromocytoma: yes or no?

A 76-year-old woman was admitted for cardiac decompensation, hypertension, and renal failure. To explore her chronic hypertension, urinary fractionated metanephrines were quantified. Fig. 1A shows the chromatogram of the patient’s urine, and Fig. 1B shows the chromatogram of a calibration standard. A very large methoxytyramine peak was observed (Fig. 1A, black arrow). The peak signal was satura...

Cognitive impairment: yes or no?

value cannot rule out the possibility that some area in the brain may be hypoxic or ischemic. We agree that this is a major limitation of the method. However, the same triticism could be brought against the measurement of cerebral oxygenation by methods that monitor a very limited cerebrd area, such as near-infrared spectroscopy (NIRS) or direct cerebral oxygen measurement with intracerebra1 pr...