Our top stories from 2017. All the stories we thought particularly interesting, from gravitational waves to Roman concrete!
Are diet drinks causing dementia and strokes? Caterpillars could eat all the plastics, why dragonflies fake their own deaths and sequencing DNA from soil.
The Ig Nobel Prizes honour achievements that first make us laugh, then make us think. We take a look at this year’s winners: from rats in pants to collecting flies!