Archive for September 18th, 2012
In an experiment, researchers found that crows were more likely to forage when they could attribute changes in their environment to a human presence.
This behaviour may suggest “complex cognition”, according to a study published in the Proceedings of the National Academy of Sciences. Until now the ability to make inferences based on causes has been attributed to humans but not animals.
The study was a collaboration between researchers from the University of Auckland, New Zealand, the University of Cambridge, UK and the University of Vienna, Austria.
In their experiment eight wild crows used tools to remove food from a box. Inside the enclosure there was a stick and the crows were tested in two separate series of events that both involved the stick moving.
In one instance a human entered the hide and the stick moved. In the other, the stick still moved but no human entered. On the occasions when no human was observed entering the hide, the crows abandoned their efforts to probe for food using a tool more frequently than they did when a human had been observed.
According to the scientists, the study proved that crows attributed the stick’s movement to human presence.
Apple revealed last week that it has more than 700,000 apps in its App Store. Google isn’t far behind with 650,000 in the Google Play store.
With this huge amount of apps, it’s easy for some to get lost in the mix. There are 400,000 iPhone apps, for example, which have never been downloaded. Not even once.
Between the hits and the duds are solid apps which make your day better. We’re highlighting a dozen that we think are amazing, but don’t get enough recognition.
Check these out and play around with them. You might discover a new favorite.