Science & technology

An engine made of water

To boldly dump

In space, nobody ever tidies up

Dog behaviour

Great, big puppies

Microprocessors

Crossed lines

Prostate cancer

To screen, or not to screen?

For men with cancerous prostate glands, ignorance may sometimes be bliss

Something new in mind

The idea of repairing brains with nerve cells from fetuses is old and controversial. Novel technologies threaten to make it redundant

Magnetism

Bang on target

The quadrillionth quadrille

Chemical reactions happen in mind-bogglingly short spans of time. But not so short that science cannot capture them

Pest control

Jumbo problems