The Download: aging clocks, and repairing the internet

Plus: California's AI safety bill has passed into law Wrinkles and gray hairs aside, it can be difficult to know how well--or poorly--someone's body is truly aging. A person who develops age-related diseases earlier in life, or has other biological changes associated with aging, might be considered "biologically older" than a similar-age person who doesn't have those changes. Some 80-year-olds will be weak and frail, while others are fit and active. Over the past decade, scientists have been uncovering new methods of looking at the hidden ways our bodies are aging. And what they've found is changing our understanding of aging itself. Can we repair the internet?