EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

A red mason bee (Osmia bicornis) in its winter quarters, a reed stalk. When wild bees like this hatch at the right time after a long winter break, they have enough energy reserves left to take flight ...

A large-scale experiment shows that warmth brings bees and wasps out of hibernation earlier –leaving some of them with poorer starting conditions. This is particularly true for species in cooler ...