Trees use a "muscle", tension wood, to correct their posture

Imo the title here buries the lede: we've known that trees form tension wood in response to external stress. This study claims to find that trees will form it in response only to their own curvature, independent of external factors even including gravity. They compare it to proprioception. That's neat!

Let me take this opportunity to remind HN readers - Posture & Hydration Check!