Bees are under stress- and we rely on them for our food

Summer Macro bumblebee image on thistle,taken at Glan Oughterard Co Galway. Source: Moment RF / pskeltonphoto/Getty Images

Museum collections of bees show that they are increasingly stressed by climate changes, according to a new study published by scientists from Imperial College London and the Natural History Museum.

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Researchers took photos of thousands of bumblebees to study the evolution of their shape during the 20th century.

Kulasegaram Sanchayan reports in Tamil with a feature written by Allan Lee.

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