A variant of the virus caused disease in people in 1997, when there was a small but deadly outbreak in Hong Kong. Eighteen ...

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.

Now it’s time for more efficient AIs to take over. After years of controversy, stem cells are on the cusp of cures for conditions like epilepsy and type 1 diabetes. A two-hour interview is enough to ...