Honeybee historians might seem like a flight of fancy but these tiny pollinators have been helping researchers from the National Botanic Garden of Wales track how the UK's fields, hedgerows, wild spaces and gardens have changed since the 1950s.Using cutting-edge DNA barcoding techniques, scientists at the Botanic Garden identified which plants modern-day honeybees visited most often by looking at the pollen grains trapped within honey.
source https://phys.org/news/2021-01-honeybees-reveal-floral-landscape-years.html