Deepfakes are videos, audio, or images that seem real but have been manipulated with AI. They've been used to try to influence elections and to create non-consensual pornography. Researchers are developing new ways to detect deepfakes, such as AI models that spot color abnormalities. And authentication methods, like digital watermarks, can help prove that a video or image has been altered. But simply detecting deepfakes may not be enough to prevent harm. Disinformation can still spread even after deepfakes are identified. And, deepfake creators are finding sophisticated ways to evade detection, so combating them remains a challenge.