Stone-depositing and stone-dropping behavior on photovoltaic panels by crows <i>Corvus</i>

How Insightful Is ‘Insight’? New Caledonian Crows Do Not Attend to Object Weight during Spontaneous Stone Dropping

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...

HIV prevalence in Zimbabwe dropping like a stone.

HIV in Zimbabwe is disappearing like ‘snow in the desert’, in dramatic contrast to its neighbouring countries, mystifying epidemiologists, one of whom firmly believes the anomaly can be attributed to the country’s relatively high level of education. Brian Williams of the South African Centre for Epidemiological Modelling and Analysis (SACEMA), was speaking at the 2nd Consortium to Respond Effec...

The Discussion on Stone

Production of artificial stone slabs using waste granite and marble stone sludge samples

In this work, the waste stone sludge obtained from the granite and marble stone processing factories was used for the manufacture of artificial stones using vibratory compaction in a vacuum environment. The results obtained showed that water absorption and density increased, and the flexure, compressive, and tensile strengths decreased with increase in the content of the waste stone sludge. The...

Stone Composition in Patients Who Undergo Renal Stone Surgery: Review of 423 Stone Analyses in Southern Iran