The world's last remaining "pristine" forest – the boreal forest across large stretches of Russia, Canada and other northern countries – is under increasing threat, a team of international researchers has found.

Love songs aren't only for soft rock FM stations – they're also used by romantic bats, and researchers at Texas A&M University and the University of Texas at Austin are believed to be the first to decode the mysterious love sounds made by the winged creatures. Their work is published in the current issue of PloS One (Public Library of Science).