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The duo behind Alexa and Amazon's in-home devices explain what's coming in the next wave of voice technology and machine learning that will power connected homes, search and shopping.

As tech giants embrace voice-enabled AI assistants to power purchases, play songs and deliver the weather report, hear the latest on Mica, Magic Leap's AI-powered virtual human, who wants to help you do more.

Scientists are looking to Earth's most extreme environments for clues about what alien lifeforms might look like. The data they gather could help future space explorers to understand the origins of life in the universe.

In Antarctica, robots are helping scientists explore how life evolves in extreme environments. Such missions are dress-rehearsals for future space exploration to the ice-covered moons of Jupiter and Saturn, where alien life could be thriving.

This week, it's all about how we buy stuff and how that stuff gets to us. David, Joanna and Christopher bring on WSJ reporter Katie Bindley to talk about how to make sure you're getting the best deals on Amazon-and all the ways what you see on the page might not be what you think. Next, Julie Jargon, the team's new Family & Tech columnist, comes on to talk about a project she worked on before she took up her new gig: The Journal's Delivery Wars series looked at the tension between customers who want everything on their doorstep and businesses who want to actually make money. Finally, Christopher interviews Yariv Bash, CEO of Flytrex, about whether drones could one day deliver everything we need right into our hands.

Encore edition: The wars of the future will be fought in megacities around the world by soldiers connected - and possibly even augmented - by neural implants and AI. In this episode, we examine how military leaders are preparing for a radical shift in combat.

Encore edition: Millions of people suffering from mental health issues are left untreated and undiagnosed. In this episode, we meet the psychologists and scientists studying how artificial intelligence can help.

Artificial intelligence will change all of our jobs, according to IBM's Chief Executive. But will the technology augment workers or replace them? Ms. Rometty spoke with WSJ Editor in Chief Matt Murray at the World Economic Forum in Davos, Switzerland.

Algorithms are the new matchmakers. Apps have turned dating into a game. And unlimited options have confounded digitally savvy singles. We spoke to the technologists and social scientists reshaping romantic connection.

Shifting weather patterns and rising temperatures are altering what crops farmers can plant. In the last of a three-part series on climate, we examine how advancements in AI and genetics could help farms battle drought and crop disease.