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ScienceQuiet 8d · day 15

First adult T. rex footprints discovered in North Dakota

Scientists find a 23-foot trackway of four fossilized footprints dating to 66.5 million years ago in Hell Creek Formation.

What to know

  • Scientists found the first known series of footprints from an adult T. rex—a 23-foot trackway with four three-toed prints dating to 66.5 million years ago in Hell Creek Formation, North Dakota.
  • The trackway reveals the dinosaur walked at 3.5–4.5 mph (brisk human walking pace), calculated from 3-foot footprints spaced 13 feet apart.
  • Trackways provide rare behavioral snapshots that isolated bones cannot; this is the first such T. rex sequence ever documented.
  • Three footprints will be recovered by helicopter later in 2026 and housed at the Denver Museum.

“As a teacher, I'm always telling my students that science starts with curiosity, passion and careful observation. I never imagined that could lead me to a discovery like this.”

Kent Hups, Schoolteacher and co-author · The Guardian ↗

Tyler Lyson Senior curator of vertebrate paleontology, Denver MuseumKent Hups Colorado schoolteacher, museum volunteer, co-authorDenver Museum of Nature and Science Lead research institutionLiverpool John Moores University Collaborating research institution

First adult T. rex footprints discovered in North Dakota
theguardian.com

How it unfolded 2 developments, newest first · click a bar or a number to jump articlesvideosposts

Peak 8 pieces in 4h at Sep 11, 9 AM; 52 pieces over 15 days (39 articles · 1 video · 12 posts) Sep 9, 9 AM — 6 pieces · 6 articles — Google News 5, Newswires 1Sep 9, 1 PM — quietSep 9, 5 PM — quietSep 9, 9 PM — quietSep 10, 1 AM — quietSep 10, 5 AM — quietSep 10, 9 AM — 3 pieces · 2 articles · 1 post — Google News 1, Mastodon 1, Newswires 1Sep 10, 1 PM — quietSep 10, 5 PM — 1 piece · 1 article — Google News 1Sep 10, 9 PM — 1 piece · 1 video — YouTube 1Sep 11, 1 AM — quietSep 11, 5 AM — 3 pieces · 3 articles — Google News 2, Newswires 1Sep 11, 9 AM — 8 pieces · 6 articles · 2 posts — Newswires 3, Google News 3, Hacker News 1, +1 moreSep 11, 1 PM — quietSep 11, 5 PM — 3 pieces · 2 articles · 1 post — Google News 2, Mastodon 1Sep 11, 9 PM — quietSep 12, 1 AM — 1 piece · 1 article — Google News 1Sep 12, 5 AM — quietSep 12, 9 AM — quietSep 12, 1 PM — quietSep 12, 5 PM — 1 piece · 1 post — Mastodon 1Sep 12, 9 PM — quietSep 13, 1 AM — quietSep 13, 5 AM — 3 pieces · 3 articles — Google News 2, Newswires 1Sep 13, 9 AM — 1 piece · 1 post — Bluesky 1Sep 13, 1 PM — 2 pieces · 2 articles — Google News 1, Newswires 1Sep 13, 5 PM — quietSep 13, 9 PM — quietSep 14, 1 AM — 3 pieces · 3 articles — Google News 3Sep 14, 5 AM — 1 piece · 1 article — Newswires 1Sep 14, 9 AM — quietSep 14, 1 PM — 1 piece · 1 post — Mastodon 1Sep 14, 5 PM — 4 pieces · 2 articles · 2 posts — Google News 2, Mastodon 2Sep 14, 9 PM — 1 piece · 1 post — Mastodon 1Sep 15, 1 AM — quietSep 15, 5 AM — quietSep 15, 9 AM — 3 pieces · 2 articles · 1 post — Newswires 2, Mastodon 1Sep 15, 1 PM — 4 pieces · 3 articles · 1 post — Newswires 2, Google News 1, Mastodon 1Sep 15, 5 PM — 1 piece · 1 article — Google News 1Sep 15, 9 PM — quietSep 16, 1 AM — quietSep 16, 5 AM — 1 piece · 1 article — Newswires 1Sep 16, 9 AM — quietSep 16, 1 PM — quietSep 16, 5 PM — quietSep 16, 9 PM — quietSep 17, 1 AM — quietSep 17, 5 AM — quietSep 17, 9 AM — quietSep 17, 1 PM — quietSep 17, 5 PM — quietSep 17, 9 PM — quietSep 18, 1 AM — quietSep 18, 5 AM — quietSep 18, 9 AM — quietSep 18, 1 PM — quietSep 18, 5 PM — quietSep 18, 9 PM — quietSep 19, 1 AM — quietSep 19, 5 AM — quietSep 19, 9 AM — quietSep 19, 1 PM — quietSep 19, 5 PM — quietSep 19, 9 PM — quietSep 20, 1 AM — quietSep 20, 5 AM — quietSep 20, 9 AM — quietSep 20, 1 PM — quietSep 20, 5 PM — quietSep 20, 9 PM — quietSep 21, 1 AM — quietSep 21, 5 AM — quietSep 21, 9 AM — quietSep 21, 1 PM — quietSep 21, 5 PM — quietSep 21, 9 PM — quietSep 22, 1 AM — quietSep 22, 5 AM — quietSep 22, 9 AM — quietSep 22, 1 PM — quietSep 22, 5 PM — quietSep 22, 9 PM — quietYesterday, 1 AM — quietYesterday, 5 AM — quietYesterday, 9 AM — quietYesterday, 1 PM — quietYesterday, 5 PM — quietYesterday, 9 PM — quietToday, 1 AM — quietToday, 5 AM — quietToday, 9 AM — quiet 1–2
Sep 10Sep 12Sep 14Sep 16Sep 18Sep 20Sep 22now · 11:47 AM ET
  1. 2

    Three footprints scheduled for helicopter recovery

    Three of the discovered footprints are set to be recovered by helicopter later in 2026 and transported to the Denver Museum of Nature and Science.

    “Bones tell us an enormous amount about these animals, but footprints capture a moment of behavior.”
    — Tyler Lyson, Senior curator of vertebrate paleontology · source
    1. first by Guardian, 13d ago · also All That's Interesting, Gizmodo, Smithsonian Magazine, Smithsonian, NYT, NYT Science +2

      4 more headlines
    2. first by BBC, 13d ago · also Gadget Review, WLWT, Valley News Live, CBS News, Ynetnews, Good News Network

      4 more headlines
    • fionnbharr@mastodon.social

      The adult dinosaur had a 13-foot stride, and moved about as fast as a human walking at a brisk pace. https:// gizmodo.com/massive-footprints -found-in-north-dakota-reveal-how-t-rex-walked-2000811277 # dinosaurs # science # paleontology

      fionnbharr@mastodon.socialMastodon9d ago1▲view on Mastodon ↗
    2 more of the top 3 · 4 posts in this stretch
    • digyoursoul@universeodon.com

      Scientists discover the first known adult T. rex trackway in North Dakota. Researchers have confirmed the first ever sequence of footprints, or trackway, left by an adult T. rex, a discovery that offers rare insight into how the predator actually moved. The 23 foot trackway, made up of four three toed footprints roughly three feet long each, was…

      digyoursoul@universeodon.comMastodon9d agoview on Mastodon ↗
    • dougiec3@libretooth.gr

      "Each of the footprints is about 3ft (0.91m) long, with a stride of about 13ft (3.96m)." https://www. theguardian.com/us-news/2026/s ep/11/tyrannosaurus-rex-footprints-north-dakota # Paleantology # Dinosaurs # Fossils # TRex

      dougiec3@libretooth.grMastodon12d agoview on Mastodon ↗
    all of them →
  2. 1

    Findings published; T. rex walked at brisk human pace

    The research team's findings were published in a scientific journal. Using high-resolution 3D surface scanning, they determined each footprint was about 3 feet long with a 13-foot stride, indicating the animal walked at approximately 3.5–4.5 mph.

    “With a trackway, we can actually follow an animal as it moved across the landscape. That is incredibly rare for T rex.”
    — Tyler Lyson
    1. first by newser.com, 12d ago · also Times of India, Fox News

      3 more headlines
  3. background

    Researchers identify adult T. rex trackway in Hell Creek Formation — Scientists from the Denver Museum of Nature and Science and Liverpool John Moores University first identified the 23-foot trackway consisting of four three-toed footprints in southwestern North Dakota.

Also covered reported alongside — the timeline has no entry for these yet

  1. first by The Times of India, 13d ago · also NewsBytes, ScienceAlert

    2 more headlines
  2. first by NDTV, 11d ago · also Nautilus

    1 more headline
  3. first by NY Post, 13d ago · also Yahoo News Canada

    1 more headline

and 1 smaller piece

What people are saying 1 voices from 1 site · best of 4 · verbatim