We’ve all got an old smartphone lying around somewhere, collecting dust in a drawer. Maybe you’ve kept it as a backup, or perhaps you haven’t gotten around to selling it. But what if that forgotten ...

A bipedal humanoid robot that walks, recovers from falls, follows people by camera, and understands speech commands can now be built for under $400 in hardware — using an Android phone priced at $50 ...

Forbes contributors publish independent expert analyses and insights. Ewan Spence covers the digital worlds of mobile technology. This voice experience is generated by AI. Learn more. This voice ...