Lithium-ion batteries power everything from phones and electric vehicles to grid-scale energy storage and earbuds, but their cathodes—the part of batteries denoted by a plus sign—are expensive to make ...

Phyphox can do so much that explaining it all would take hours. The real fun starts once you begin testing the world around you.

WASHINGTON — Google is making it easier for people to create Android apps with artificial intelligence, even if they don’t know how to code. At its Google I/O developer conference this week, the ...