Tuesday, Jul 28, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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The Claim

An adult Tyrannosaurus rex needed to eat about 700 kilograms of meat per day to avoid starvation.

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The Short Version

The evidence does not support a daily requirement anywhere near 700 kilograms of meat. Peer-reviewed estimates and reputable summaries place an adult T. rex far lower, often around 17-140 kg per day depending on metabolism, with even high-end models still well below 700 kg. The claim appears to confuse a possible one-time binge meal with a continuous daily starvation threshold.

Caveats

  • Daily average energy needs are not the same as the size of a single meal after several days without feeding.
  • T. rex food requirements depend heavily on the assumed metabolism, but none of the credible estimates in the evidence base approach 700 kg/day.
  • Several low-quality online discussions inflate the number without peer-reviewed support.

The Receipts

  1. Estimating energy expenditure and food requirements in dinosaurs

    PeerJ

  2. What Was on the T. Rex Menu? Sometimes Each Other

    National Geographic

  3. Some Irreverent Thoughts

    Smithsonian (repository.si.edu)

  4. Estimating energy expenditure and food requirements in dinosaurs

    PubMed

  5. How Many Humans Would a T-Rex Need to Eat Every Day to Survive?

    Gizmodo

  6. How Do You Feed A T. Rex?

    FiveThirtyEight

  7. How much meat did T. rex eat a day?

    The Environmental Literacy Council

  8. How do you feed a T. rex?

    The Conversation

  9. It was 4 meters tall, twice as heavy as an elephant, had ...

    Discover Wildlife

  10. T-Rex Diet Facts: What Did Tyrannosaurus Rex Really Eat?

    Jurassic Apparel

+ 9 more sources — see the full list on Lenz

Filed Under

Tyrannosaurus Rex

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