Engineering

As treaties end, Russia focuses on hypersonic weapons that could “tighten the noose” on current U.S. defenses

Imagine a single trained operator making a bridge, home or barracks

Deploying sunlight-blocking aerosols to counteract only some global warming could avoid changes to precipitation

Remote techniques can detect signs of active testing—but they don’t tell us everything

Weapons that kill enemies on their own threaten civilians and soldiers alike

Engineered microorganisms churn out THC, CBD and rarer, less-understood cannabis cousins

Artificial intelligence experts, ethicists and diplomats debate autonomous weapons. Christopher Intagliata reports.

As automated delivery ramps up, cities must decide how to make the best use of public spaces

The rover Opportunity has called it quits after working for more than 14 years on Mars.

AI enhancement and a virtual time machine are included in the short list of pitches

Design principles derived from observing fruit flies may lead to better self-driving cars and improved Parkinson’s treatment

How does the laser technology that earned the 2018 Nobel Prize in Physics come into our everyday lives?