They are pretty accurate. But they could keep you up at night

They learn to associate it with food

A study of an Antarctic crew finds that eventually time together breeds conflict

Listening to your gut could involve riboflavin batteries and toothpaste transistors

Unless you’re athletic or unwell

Private money is bringing new ideas—and new concerns—to solar-geoengineering research

Solid-state cells would be faster and safer than today’s lithium-ion equivalents

The risk to public health remains low

Understanding why could help boost their numbers

Very. But beware the side-effects

Good data are hard to come by

They did so tens of thousands of years before humans

The causes are often beyond their control

Air purifiers are more effective and easier to maintain

They may be useful targets for future drugs

An outbreak on a cruise ship has authorities concerned

Leading models are getting better at designing pathogens

It seems useful for pain. The jury’s out on everything else

A hacking conference reveals how machines will defend us

The technology could tackle diseases such as atherosclerosis and hepatitis B