Hannah Devlin is the Guardian's science correspondent, having previously been science editor of the Times. She has a PhD in biomedical imaging from the University of Oxford. Hannah also presents the Science Weekly podcast.
A study suggests that rather than helping you go incognito, soapy fragrances could make you a more attractive target, with mosquitoes favouring the scent of volunteers who washed with three out of four popular soap brands tested.
In the latest study, scientists tried a method they called the MooLoo approach to teach calves to use a toilet area in their barn, meaning that urine could be collected and treated.
