16 New Caledonian crows make and use tools and tool types vary over geographic landscapes. Social 17 learning may explain the variation in tool design, but it is unknown to what degree social learning 18 accounts for the maintenance of these designs. Indeed, little is known about the mechanisms these 19 crows use to obtain information from others, despite the question’s importance in understand...

I N.J. Allen has recently investigated the possibility of modelling transformations from tetradic society – which he devised as a model of prehistoric human kinship and is intimately linked to his scholarship – to what are conventionally known as Crow-Omaha systems, themselves the subject of a recent collection reappraising the problems associated with them (Trautmann and Whiteley 2012). Allen’...

Richard Wright’s introductory essay to his collection of short stories Uncle Tom's Children describes hidden forms of resistance against Jim Crowism and Uncle Tomism. The essay entitled The Ethics of Living Jim Crow: An Autobiographical Sketch relates Wright’s daily confrontations with Jim Crowism with a particular emphasis on his evasive actions, and his covert activities, such as silence, pla...

The article discusses the long-standing Crow-Omaha problem in kinship studies with a focus on volume Crow-Omaha: New Light Classic Problem of Kinship Analysis (2012), edited by Thomas Trautmann and Peter Whiteley. While successful restoring importance to contributing revival “traditional” anthropology, book misses an opportunity advance solution this problem. Drawing global database terminologi...

A scheme for remote weak signal sensor is proposed in which a coupled resonator optical waveguide~(CROW), as transmitter, couples to hybrid optomechanical cavity and an observing cavity, respectively. The non-Markovian theory employed study the force by treating CROW reservoir of fields, negative-effective-mass~(NEM) oscillator introduced cancel back-action noise. Under certain conditions, diss...

While humans are able to understand much about causality, it is unclear to what extent non-human animals can do the same. The Aesop's Fable paradigm requires an animal to drop stones into a water-filled tube to bring a floating food reward within reach. Rook, Eurasian jay, and New Caledonian crow performances are similar to those of children under seven years of age when solving this task. Howe...

It is highly difficult to pinpoint what is going through an animal's mind when it appears to solve a problem by 'insight'. Here, we searched for an information processing error during the emergence of seemingly insightful stone dropping in New Caledonian crows. We presented these birds with the platform apparatus, where a heavy object needs to be dropped down a tube and onto a platform in order...