LifeThe Great Northern Expedition: triumph or tragedy? Peter the Great funded a fabulously expensive expedition to Russia's far east and Alaska. The first account tells a harrowing tale of how it fared Culture
LifeThe ingenious priest who discovered how bats 'see' in the darkAlmost 150 years before anyone recorded their ultrasound calls, Lazzaro Spallanzani’s cunning yet gruesome experiments revealed how bats navigate in darknessFeatures