Zhihu Hot List
Latest recorded position: #16 on Jul 27, 2026, 8:23 AM CST.
There are not enough retained observations to calculate a rank change.
Human nails seem to have no practical value in life, so why have they not deteriorated for so long?
人类的指甲在生活中看起来好像并没有什么实际的价值，为什么这么长时间也没有退化呢？
ThreadEast first recorded "Human nails seem to have no practical value in life, so why have they not deteriorated for so long?" on Jul 26, 2026, 8:14 PM CST. It has been observed on Zhihu Hot List, with 12 hours between the first and latest recorded appearances.
What the trend data tells us
The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.
This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.
Original evidence
Source listings
#16Source metric: 59 万热度
Original source