{
  "$type": "site.standard.document",
  "bskyPostRef": {
    "cid": "bafyreiddaax7k22d6mk5ki4eeqbasj3l53dcdqxcoecn2zurwipyh5jyvq",
    "uri": "at://did:plc:kpkcscbf2zshv7shqgqn45wn/app.bsky.feed.post/3mhlgymao6b32"
  },
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreihtqpj44yybh33fvom5hbiekhe36o3qo37x5lcit5nfxrpdke7tg4"
    },
    "mimeType": "image/jpeg",
    "size": 1436
  },
  "path": "/story/385797/mathematicians-back-up-a-rule-of-fashion.html",
  "publishedAt": "2026-03-21T08:30:00.000Z",
  "site": "https://www.newser.com",
  "textContent": "Mathematicians say they've confirmed an age-old rule of fashion: that trendy women's styles get recycled every 20 years or so. For the study out of Northwestern University , researchers pulled together a database of some 37,000 garments spanning nearly 160 years, combining archival sewing patterns with runway images dating to...",
  "title": "Fashion's 20-Year Rule Is Now Backed Up by Math"
}