'Deepfakes' pose conundrum for Facebook, Zuckerberg says

Facebook chief executive Mark Zuckerberg said Wednesday the leading social network is struggling to find ways to deal with "deepfake" videos which have the potential to deceive and manipulate users on a massive scale.

Health impact from smoke rises with more intense wildfires

Climate change in the Western U.S. means more intense and frequent wildfires churning out waves of smoke that scientists say will sweep across the continent to affect tens of millions of people and cause a spike in premature ...