males have an x and y. the process involves inserting half the gene editing molecule into the father's y chromosome, and the other half into the mother's dna. after mating, male xy embryos containing both halves of gene editing molecule will not develop. but female embryos will grow normally. gene editing can be used to make other genetic changes. these piglets are resistant to a lung disease that often devastates herds. the government is considering whether to allow the use of the technology by the farming industry. pallab ghosh, bbc news. tens of millions of people are facing severe food shortages across a huge area of east africa, as the region faces the worst drought for many years. crops are failing and animals on which many communities depend are dying of thirst. there's been three years of poor rainfall in northern kenya, much of somalia and southern ethiopia. it's feared the drought will continue long into next year,