When thinking about regulating them, it's useful to know Facebook, Amazon, Google, Apple and Microsoft have some similarities. But generally they're not competing with each other – or anyone else.
A new method has been developed to find objects that land at sea using underwater sounds.
Concerns over filter bubbles and fake news are often based on anecdotal evidence. There is relatively little systematic research on the topic; a new survey finds widespread fears are unwarranted.
The search engine's founders saw this one coming 20 years ago. So how should they react now?