A new study shows that exposure to two specific 'forever chemicals' may accelerate biological aging, especially in middle-aged men. Researchers revealed a link between faster epigenetic aging, and two of these alternatives, PFNA and PFOSA, a precursor of PFOA.
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TA们不惜重金投入，意在将硬件作为打入用户生活、采集全景数据、导流生态服务的“特洛伊木马”，Meta与雷朋合作的眼镜已卖出超百万副，目标不是撒瓜俩枣的硬件利润，而是巩固其社交与内容王国的前端感知节点。
One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.