Self-healing Concrete, Chaos Pigeons and The Dark Factor - A Little Bit Of Science | Lyssna här

This week’s episode: Roman concrete. The Pantheon has been standing for roughly 2,000 years with a huge dome made of unreinforced concrete, and it’s still in better shape than plenty of modern buildings. The Romans used volcanic ash and quicklime, and the chemistry seems to keep strengthening the material over time. Researchers think it may even “self-heal”, with minerals like calcite forming and filling tiny cracks as water moves through.

Then we switch to psychology and the “dark factor”, a proposed common thread linking traits like narcissism, psychopathy, and Machiavellianism. The unsettling part is that it may stay fairly stable over time, which raises the question of whether measuring it helps predict behaviour and guide rehabilitation, or just gives us a cleaner label for something we already recognise.

Finally, pigeons. They’re used in research because they’re good for studying reward and decision-making, but they don’t always play nice with predictable patterns. Put them in a messy, random environment and they keep adapting, trying new strategies, and operating right on the edge of chaos, which is frustrating for tidy experiments and a pretty good match for real life.

So that’s the week: a 2,000-year-old concrete recipe that still shows us up, a dark personality thread that might explain why some people are consistently hard work, and pigeons reminding everyone that real behaviour is rarely neat or predictable.

CHAPTER MARKERS:

00:00 Intro

01:58 Dark Triad Explained

02:51 Measuring the D Factor

08:17 Ethics and Pre-Crime

09:12 Roman Concrete Mystery

11:56 Self-Healing Calcite

13:02 Roman Self-Healing Concrete

14:10 Plant Based Diet Confusion

17:25 Pigeons In Psychology

19:32 The Edge Of Chaos

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