Google co-founder's letter focuses on the dangers and promises of A.I.

The annual Google founders' letters provide insight into the minds that lead one of the world's largest tech firms. Google co-founder and current Alphabet president Sergey Brin wrote this year's letter. Brin briefly mentioned Etherum and the cryptocurrency boom, but a highlight of the letter was the rise of artificial intelligence, which he called the "most significant development in computing in my lifetime." Brin noted that when Google was first founded, A.I. and neural networks were largely viewed as little more than relics in the history of computer science. Today Google and other companies use A.I. for everything from photo analysis to translation services.