Quiz: Rings

Bulletin of 8 January 2026

What is the science of dating past events by studying annual growth rings in trees?
Answer
Dendrochronology.
What is the nest of a ringtail possum called? (bonus: where does the word originate?).
Answer
Drey. (bonus: English term for a squirrel’s nest).
What is the average size of a blue-ringed octopus (arms included)?
Answer
10-20 centimetres.
The age of a bony fish can be determined by examining the annual rings laid down in what bone-like structure in its head?
Answer
Otolith.
What is an elastrator?
Answer
A device used to apply rubber rings to castrate livestock (or for docking tails etc.).

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