Science has given us a world of colourful waste-to-gold stories, but the latest surely takes the cake ... or mouldy bread. Within rotting loaves of Molenberg or Nature's Fresh could lie the answer to a new generation of rechargeable battery. Scottish and Chinese researchers behind the research found common bread mould converts manganese into a material that performs better than manganese oxides used in today's lithium-ion batteries. It's due to a fungus, found in bread mould, that can transform manganese into a mineral composite with favourable electrochemical properties. "The electrochemical properties ... were tested in a supercapacitor and lithium-ion battery, and it was found to have excellent electrochemical properties," said Professor Geoffrey Gadd of the University of Dundee. "This suggests a novel biotechnological method for the preparation of sustainable electrochemical materials."
Arachnophobe's worst nightmare
In the name of science, one US researcher has gone far beyond the call - spending each night for several weeks in the company of 300,000 bats. Also keeping UCLA biologist Kenneth Chapin company in darkened caves in Puerto Rico were snakes, cockroaches and spiders. He was there to study huge whip spiders, a poorly-understood relative of scorpions that have ghastly long claws, don't build webs and happened to be tortured with magic in one scene of the film Harry Potter and the Goblet of Fire. "They look terrifying, but are actually delicate, timid and afraid of you," said Chapin. "I was more excited than terrified." His experience was worth it: in the Journal of Arachnology, he was able to report many new findings about the spiders, including the fact they sometimes eat each other after territorial scraps.
Bad memories movies got it right
Charlie Kaufman's 2004 film Eternal Sunshine of The Spotless Mind might not have been too far off the mark when it comes to blocking out bad memories. A US and UK study has just found that when a patient voluntarily tries to suppress a memory, unrelated experiences surrounding the time of the suppression are likely forgotten also. The scientists put 381 participants through experiments where they were asked to memorise word-pair associations, but instructed to try to suppress the memory of the second word. They found the instruction to suppress the memory of words also made it harder to remember details about objects presented shortly before or after reminders of the to-be-suppressed words. MRI scans revealed how the area of the brain linked with memory formation was reduced during the suppression, which might explain memory lapses after traumatic events.