From the smart drug modafinil to oxygen chambers, interest in cognitive enhancement is growing. But can it actually make you cleverer? I tried to find out
Tech hasn’t always been female-friendly – but a new wave of apps is changing that. From contraception to workouts, here are the ones Guardian writers swear by
These days, if we’re not staring at our smartphones, we’re sitting in front of computers. And more than half of office workers have reported the symptoms of eyestrain. How do you protect yourself?
Add one of these heavy metal nuggets to your cooking water to suffuse the liquid with enough iron to stave off anaemia – and you can help the world’s poor at the same time
Only when I tried to quit social networks did I realise how addictive and enveloping they are designed to be. Now I am convinced we are heading for a public health crisis