When Zeus, a medical student living in a hilltop city in central Nigeria, returns to his studio apartment from a long day at the hospital, he turns on his ring light, straps his iPhone to his forehead, and starts recording himself. He raises his hands in front of him like a sleepwalker and puts a...

This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world of technology. The gig workers who are training humanoid robots at home When Zeus, a medical student in Nigeria, returns to his apartment from a long day at the hospital, he straps his...