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Weightlifting could cut the risk of dementia in elderly people. According to a study carried out by Campinas University in Sao Paulo, Brazil, those who have a mild cognitive impairment - which causes people to have noticeable but not serious memory or thinking problems - could remember things better after lifting weights twice a week for half a year. As well as improving memory, the research - which included 44 people - showed that weightlifting altered brain anatomy. Dr. Isadora [...]

A study has revealed that plastic fibres and particles - which are thought to have originated from clothing, bottles and food packaging - were discovered in the brains of people who had passed away, leading scientists to conclude that the harmful particles are being breathed in. Scientists conducted the study on samples taken from the brains of 15 people from Sao Paulo, Brazil, finding traces of polypropylene in eight of them. The results from this research add to the growing evidence [...]

Frogs are able to scream - but humans can't hear them. Experts have discovered that the amphibians shriek at an ear-piercing volume as a defensive mechanism to fend off other animals. Researchers in Brazil's Amazonian jungle noticed that small leaf litter frogs were throwing back their heads and opening their mouths wide. It appeared as if they were screaming but the scientists were unable to hear any noise. However, the team was able to hear the sounds of the frogs using [...]