We know introduced honeybees as the ever-busy helpers of our gardens, farms and orchards. In pollinating crops and fertilizing fruit, they support more than a third of the food we eat and are worth ...

Global average wheat yields grew by 2.95% per year from 1961 to 1990, but grew at less than a third that rate (0.85% per year) for 1990–2012 (ref. 1). Changes in how, where and when crops are grown ...