The Rest Is Science
The Rest Is Science

Why We Cry Out In Pain

March 11, 2026

AI Summary

5 min read

The episode explores instinctive human responses to pain, distress, and competition, alongside the ways emerging technologies like quantum computing and AI might alter those responses. Listener questions drive the discussion, linking physical expressions of discomfort to broader patterns of ego, rivalry, and social signaling.

Vocalizing Pain

The hosts address why people groan, cry, or scream when hurt. These sounds appear across the animal kingdom and even in plants, which release chemical signals when damaged. In humans the behavior likely serves two overlapping functions: warning others of danger and summoning help. A scream allows quick localization without requiring conscious planning, while crying in children often stops once an adult arrives, suggesting the display itself reduces anxiety once assistance is detected. Swearing during pain shows mixed evidence of relief, possibly because it satisfies an urge to signal distress rather than through any direct physiological effect. Similar grunts during exertion help stabilize the core by increasing intra-abdominal pressure, giving momentary strength for lifting or pushing. Breathing techniques in childbirth and exercise follow the same principle of using controlled exhalation or vocalization to recruit stabilizing muscles.

Scientific Rivalries

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What you'll learn

  • 1 (00:50) **Listener question on Erdős pronunciation** - limerick shared to link recent episodes on math history
  • 2 (05:15) **Personal reading updates** - shift from listener mail to hosts' current books
  • 3 (07:10) **Quantum computing in Formula One** - listener asks if it would end design competition
  • 4 (09:00) **Traveling salesman problem** - example of NP-hard challenge quantum might address
  • 5 (11:25) **Cheating and loopholes in F1** - quantum would favor sneaky rule exploitation over pure optimization
  • 6 (16:19) **Why we cry out in pain** - core listener question on groaning, screaming, and help-seeking
  • 7 (17:38) **Crying as social signal** - children stop once help arrives; adults use moans to summon aid

+ Full timestamped outline available in the app

Show Notes

Have you stubbed your toe and shouted an unrepeatable word? Isaac Newton and Robert Boyle were two of the greatest minds in humanity. Did their egos and competition with one another hold them back or drive them onto huge breakthroughs?


Professor Hannah Fry and Michael Stevens explore the bizarre neurology of vocalised pain, revealing how a good yelp actually acts as a biological off-switch for suffering and unearth if Newton was the biggest crybaby in science.


Plus, Hannah gives us a behind-the-scenes look at her brand-new series exploring the cutting edge of Artificial Intelligence.


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Video Producer: Adam Thornton + Oli Oakley

Video & Social: Bex Tyrrell

Assistant Producer: Imee Marriott

Senior Producer: Lauren Armstrong-Carter

Head Of Digital: Samuel Oakley

Exec Producer: Neil Fearn

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