LVII.—On butterflies' enemies

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چکیده

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Intimidating butterflies.

Many butterfly species feature two or four conspicuously coloured eyespots on their wings; the most commonly heard explanation for these markings is that they are used to intimidate predators. However, this explanation has stood, until recently, on the flimsiest of empirical foundations. Now, Adrian Vallin and colleagues have demonstrated empirically the effectiveness of these signals in dissua...

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The "Enemies" of Parapsychology

The author regards as "enemies" of parapsychological research (1) those critics who confuse parapsychology with popular superstition, (2) those parapsychologists who know all the pieces of evidence for the reality of psi effects but who lack the capacity to integrate and to evaluate that evidence as a whole, and (3) those professional psychics whose faltering attempts to apply psi for profit gi...

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The enemies of trust.

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Bacteria and phagocytes: mortal enemies.

The research presented in this issue finds historical resonance in a classical scientific debate. Russian biologist Ilya Metchnikoff [1, 2] was awarded the Nobel Prize in 1908 for the development of the phagocyte theory, the central tenet of which was that the ‘swallowing and digestion’ of bacteria by circulating ‘white corpuscles’ (neutrophils and macrophages), enhanced by prior opsonization, ...

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Bidding among friends and enemies∗

We consider an auction setting in which bidders, even if they fail to obtain the good, care about the price paid by the winner. We study the impact of these price externalities on the first-price auction and the second-price auction in a symmetric information framework. We establish a distinction between price externalities that do not depend on the identity of the winner and price externalitie...

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ژورنال

عنوان ژورنال: Annals and Magazine of Natural History

سال: 1889

ISSN: 0374-5481

DOI: 10.1080/00222938909460372