What
on ear t h?
146 / / JANUARY 2017
What on earth?
January
teaser showed December’s
a barn owl’s feathers
In last
month’s
issue
Photographs: iStock
Animal, vegetable or mineral? This one’s hard to call. Is it a
cross-section of geological impurities, polished to perfection?
Or are these rings for the dendrochronologists among you?
Perhaps we need to look closer to home... We’ll reveal the
answer and pose another puzzler in next month’s issue.