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population dynamics

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Tracing the signature of African-to-Neandertal gene flow

A new study of African genetic variation yields a more accurate picture of the genetic exchanges between ancient Africans and Neandertals 250,000 years ago.

DNA with chains of bubbles rising from it in a fluid
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Interaction and mixture: big picture and small

From the level of function of a single gene up to the movements of entire populations, our evolution was built from mixture.

Painting from 1883 of stone age dancers feasting around a fire
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Growing genetic data suggest a two-phase model for prehistoric population expansions in Africa

I describe results from two papers of African genetic variation, which show that the population growth from agriculture followed an earlier demographic expansion.

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Modern human origins was more interesting than a single point of dispersal

A study of SNP variation across Africa enables us to look at a structured ancestral population long before 100,000 years ago.

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Why do some invasive species start to succeed only after a delay?

Reviewing a body of evolutionary theory that tries to understand the ultimate success of some invasions after a lag.

A stand of teasel