One headline, traced to the study behind it

A real example from my own work, put here free so you can judge the method before you pay for it.

The claim as it reached me

A headline like that is doing a lot of work. Before repeating it or building on it, I want to know what the actual paper measured, and whether the headline is the paper or a cousin of the paper.

What I found

The study behind it:

Read at the source: the abstract and record at PubMed, not the summary article.

What the paper actually says

• They filmed wild sooty mangabeys (a monkey that climbs vertical trunks a lot) and measured the feet in motion.
• Midfoot dorsiflexion reached about 46°, which is close to the ankle dorsiflexion measured in climbing chimpanzees, and a bit more than in climbing rainforest hunter-gatherers.
• Their read: the demands of climbing pushed different primates toward a similar foot motion, regardless of how different their foot bones look.
• So even if the last common ancestor of chimps and humans had a more monkey-like foot, vertical climbing stays a plausible part of how it moved.

What it does not say

• Not “scientists were wrong about human evolution.” The paper argues about one inference: bone shape to behavior.
• Not “fossil feet are useless.” It says the shape alone does not settle which climbing style an animal used.
• Not a claim about any specific fossil. It is a biomechanics argument that bears on how fossils get read.

What stays open

• Uncertain: one monkey species, one habitat. Whether the convergence generalizes is for later work.
• Uncertain: how much this shifts any particular hominin reconstruction. The paper widens the range of plausible readings; it does not pick one.