# Body size, not competition, may kick-start evolution

- Source: Phys.org - latest science and technology news stories
- Published: 2026-11-03T23:10:01+00:00
- Category: Science
- Original: https://phys.org/news/2026-11-body-size-competition-evolution.html
- Canonical: https://groundlevelnews.com/story/body-size-not-competition-may-kick-start-evolution-f6f756/

A new evolutionary theory suggests changes in body size, rather than competition for food and habitat, may drive the earliest physical differences between species.

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