Leonardo’s rule says that the thickness of a limb before it branches into smaller ones is the same asUsing surface area as a guide, the new rule incorporates limb widthslengths, and predicts that long branches end up being thinner than short ones. Unlike Leonardo’s guess, the updated rule works for slender birches as well as it does for sturdy oaks, the team reports.
This sketch from one of Leonardo da Vinci’s notebooks illustrates his original “rule of trees,” which posited that the thickness of a limb before it branches is the same as the combined thicknesses of all the limbs after it branches.The new Leonardo-like rule is an improvement, says Katherine McCulloh, a botanist at the University of Wisconsin–Madison who was not involved with this study. But she has her doubts about the Russian group’s rationale for it.
Still, the fact that the Leonardo-like rule appears to hold for many trees intrigues McCulloh. “To me, it drives home the question of why are [trees] conserving this geometry for their external tissue, and how is that related to the microscopic level differences that we observe in wood,” she says. “It’s a really interesting question.”
I think it’s not that important that da Vinci was close but wrong on tree branching. What matters is that, in his lifetime, he was closer to right than everyone else.
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Here's a rule. Human beings cling to distractions like crutches to get through their bleak, uninteresting lives. Sick reality, 10/10 would suffer again.
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The thickness and length determines surface area so he was right.
What kind of trees are these? I like em...
if it was 'close', it couldn't have been 'wrong', just a little bit of wrong, give him a break,
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I find it heartening to note that a Russian team of physicists has been looking deeply and reverently at the nature of trees and the vision of artists despite a government that is murderously dismantling natural and civic life. May their humanist science prevail.
Surface area connections is determining factor for gravitational strength.
I’ve been close lots of times. It’s really a human condition that many don’t believe applies to them. But thanks for pointing him out.
Not interested. Tell me something about someone who was right.
Vinci’s rule was from 500 years ago. Everything has evolved, including trees. Great new rule though.
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