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Cake day: October 9th, 2023

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  • Despite what the linked article claims, it’s still not clear whether alcohol’s known cancer risk is outweighed by any health benefits (for example, reducing the risk of stroke/CVD). At least one recent paper concluded that light or moderate alcohol use does reduce overall mortality.

    Compared with lifetime abstainers, current infrequent, light, or moderate drinkers were at a lower risk of mortality from all causes [infrequent—hazard ratio: 0.87; 95% confidence interval: 0.84 to 0.90; light: 0.77; 0.75 to 0.79; moderate 0.82; 0.80 to 0.85], CVD, chronic lower respiratory tract diseases, Alzheimer’s disease, and influenza and pneumonia. Also, light or moderate drinkers were associated with lower risk of mortality from diabetes mellitus and nephritis, nephrotic syndrome, or nephrosis. In contrast, heavy drinkers had a significantly higher risk of mortality from all causes, cancer, and accidents (unintentional injuries).














  • Gravity at the event horizon is inversely related to the mass of the black hole. So for a supermassive black hole, gravity at the event horizon can be weak. But you still can’t escape because it’s too large.

    Imagine light trying to escape the Earth’s gravity. Its path is slightly deviated by the Earth, then it gets far enough away that the Earth has little further effect.

    Now suppose at that distance, it still experienced the same gravity. So the trajectory of light is deviated a little more. It keeps moving farther away but gravity barely changes, even at huge distances. Eventually all those little deviations add up and it’s going back where it came from. Light can’t escape. It’s a black hole.