2026.10.21 – Dr Karl Kruszelnicki – Wednesday’s with Dr Karl
1) I was wrong about showering during a lightning storm being always safe, when I said this in 2018 on ABC Radio.
It’s very rare, but you can get “zapped” by lightning, while showering indoors during a thunderstorm – even if the copper pipes in your dwelling are properly earthed
2) Avocados change sex twice each day
All avocado trees (Persea americana) are cosexual, or hermaphrodites, meaning they contain both sexes in one plant. A-type trees begin with flowers in the female phase (receptive to pollen) in the morning and change to the male phase (producing pollen) in the afternoon of the next…
The skinny
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