What makes a tree a tree?
![What makes a tree a tree?](/content/images/size/w2000/2019/04/P_QuakingAspen.jpg)
Despite numerous studies and 30-plus genomes under their belts, scientists are still struggling to nail down the defining traits of these tall, long-lived, woody plants.
https://www.knowablemagazine.org/article/living-world/2018/what-makes-tree-tree
HN discussion https://news.ycombinator.com/item?id=16792726