this post was submitted on 23 Jan 2026
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I'd guess it's the species that grow there. If they regularly see -40C they'd have to have evolved to cope with it.
t could also be part of how they grow - i dunno maybe narrower / more flexible rings, better insulation, or better ways to store sap in winter conditions.
I assume this is in an area where such a temperature is very rare.
Most trees do have some radial cracks in them though - probably just some very rare cases those cracks get big enough for the tree to fall or split visibly on the outside and someone calls it an "explosion" for dramatic effect.