The reason nearly all humans are right-handed
A new study suggests that the predominance of right-handedness in humans may be linked to evolutionary changes such as bipedalism and increased brain size. Researchers from the University of Oxford analyzed handedness across various primate species and found that humans exhibit a unique right-handed bias. The findings indicate that when considering factors like brain size and limb proportions, humans are not as exceptional in their handedness as previously thought.
- ▪Approximately 90% of humans are right-handed, a trait not seen in other primate species.
- ▪The study analyzed handedness in 41 species of monkeys and apes, involving 2,025 individuals.
- ▪Including brain size and limb proportions in their models helped explain the strong right-handedness in humans.
2 outlets in our directory ran this story, first to last over 25 hours. All of the coverage we found sits in one bucket: centre. That one-sidedness is itself worth noticing.
- ▪ Leg evolution made most humans right-handed — Popular Science
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| Original publisher | The Brighter Side of News |
| Canonical URL | https://www.thebrighterside.news/post/the-strange-reason-nearly-all-humans-are-right-handed/ |
| Publication time | Sun, 17 May 2026 13:40:01 +0000 |
| Retrieval time | 2026-05-17T13:52:13.174Z |
| Last seen | 2026-05-17T13:52:13.174Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | BNny1aSt-CnW · 2 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
The strange reason nearly all humans are right-handedA new primate analysis suggests upright walking and bigger brains shaped humanity’s strong right-handed bias. Written By: Hannah Shavit-Weiner/Edited By: Joseph ShavitPublished May 16, 2026 4:51 AM PDTOxford study links human right-handedness to bipedalism and larger brains across primate evolution. (CREDIT: Shutterstock) Share this storyRoughly nine out of 10 people favor their right hand, a pattern so common it can feel almost invisible. Yet in evolutionary terms, it is deeply strange. No other primate species comes close to showing such a strong, consistent population-wide bias.A new analysis suggests that this familiar human trait may have grown out of two of the biggest changes in our evolutionary history.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at The Brighter Side of News.
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