• Researchers have discovered that instead of simply being an extra copy of each of the genes on chromosome 21, trisomy 21 has an effect on the expression of genes on other chromosomes. Rebecca Taylor observes how this new discovery has implications for the future of human genetic engineering.

• Judie Brown explains why personhood described as being “from the moment of conception” no longer applies to every human being thanks to modern reproductive technology.

• A new app-controlled device for people with hearing loss also improves normal hearing and conjures “images of a bionic future”.