
CrowdScience Did I inherit my laugh?
Jan 5, 2026
Join neuroscientist Sophie Scott, an expert on laughter, as she spills the secrets behind how our bodies produce sounds of joy. Evolutionary psychologist Gil Greengross takes us back to Darwin's musings on laughter's roots and shares studies that reveal humor's heritability. Meanwhile, Nancy Segal regales us with the touching story of the 'Giggle Twins,' two siblings reunited after decades who laughed alike despite being raised apart. Together, they explore the fascinating blend of genetics and environment that shapes our laughter.
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Listener And Father Laugh Alike
- Limbikani and his father sound almost identical when they laugh, surprising the host and listeners.
- Caroline Steel plays their recordings to illustrate how family laughs can appear shared across generations.
Laughter Is A Primitive Breath Call
- Sophie Scott explains laughter is produced by forceful exhalations using ribcage muscles rather than controlled speech mechanisms.
- She notes this produces higher pitches, whistles and gasps that are hard to voluntarily replicate.
Body Shape Alters Laugh Sound
- Physical size and vocal tract anatomy influence laugh pitch and timbre, so bigger bodies tend to laugh deeper.
- Sophie Scott links puberty hormones like testosterone to long-term voice changes that alter laughter.




