HealthHaving children plays a complicated role in the rate we age The effort of reproducing may divert energy away from repairing DNA or fighting illness, which could drive ageing, but a new study suggests that is only the case when environmental conditions are tough News
HumansWe evolved to match local micronutrient levels, which may be a problem Most human populations evolved to cope with low or high local levels of micronutrients such as zinc, but these localised adaptations might now be problematic News