Question: What are the spikes on this fallen tree? How are they

How we turn trees into beautiful oak planks - Vastern

Which Trees Produce Spiky Round Balls? Here's How to Identify Them

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Outrage over anti-pigeon spikes fitted to TREES to stop birds landing on branches - Mirror Online

Boy, 12, recovers after crushed while posing for a photo under a fallen tree which sprang upright

Cutting Down a Tree in Your Yard? 12 Genius Ways to Use the Wood

Cordyline australis - Wikipedia

Miracle-Gro Tree & Shrub Plant Food Spikes

What would explain a 'squid-like' pattern on the tree bark of a fallen tree? - Quora

What Happens to Trees that Fall in the Forest - Project Learning Tree

How to Grow and Care for Pecan Trees

My Running Experience with Ice Spikes - And When I'd Use Them Again - Consummate Athlete

Beware the “Danger Tree”