Kailash Chand: Despite all the evidence for the benefits of breastfeeding, global rates have scarcely increased in 20 years. Could significant investment help buck the trend?
Michael Reiss: Some envisage a future in which teaching is tailored according to genes. But there are lower-tech ways of being responsive to learners' needs
Deborah Orr: A report this week revealed that girls are being abused by other children. Why do adults fail to understand how vulnerable and alone adolescent girls can be?
Eat five portions of fruit and veg, drink eight glasses of water, exercise five times a week… these figures grab our attention, but do the numbers really add up? Rosie Ifould finds out