
A police officer has recalled the moment he was lowered from a helicopter into a crocodile-infested river in South Africa as part of an effort to recover human remains. Captain Johan Potgieter was tasked with capturing a crocodile suspected of eating a businessman who had been swept away by floodwater. “The crocodile itself was lying on an island… there really was no other way to get to it except from the air,” he told the BBC. Since the operation, remains have been found inside the 15ft and 1,100lb crocodile. DNA tests are underway to confirm their identity. The man’s car had become stranded attempting to cross a low bridge in the flooded Komati River last week. By the time the police got to the scene, it was empty, leading them to suspect he had been swept away by the water. Drones and helicopters were used to in the search mission which led police to a small island where a number of crocodiles lay in the sun. (via the BBC)
People with schizophrenia don’t fall for the same visual illusions that non-schizophrenics do

Normal human subjects are readily fooled by a 3D representation of a face mask, but schizophrenics are not. This visual trick is known as the hollow mask illusion and consists of a 3D representation of a hollow, concave mask of a face, viewed pointing inwards. When healthy individuals look at this, more than 99% of the time what they report seeing is a normal face that is convex. This illusion exploits the brain’s system for making sense of the visual world by superimposing what it expects to see, based on past experience and memories, with what it is actually seeing. Yet patients diagnosed with schizophrenia almost never fall for it and instead report seeing a “hollow” face. But why? To find out a joint UK and German study published in the journal Neuroimage brain scanned 16 healthy volunteers and 13 schizophrenics as they experienced the illusion, which was presented to them using a 3D headset. (via The Naked Scientists)
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