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Art for "Stem Cells Remember Tissues’ Past Injuries"
developmental biology

Stem Cells Remember Tissues’ Past Injuries

Stem cells seem to retain memories of old injuries to improve future healing. When that system goes wrong, chronic inflammation can result.

Art for "Adaptations or Neutral Changes? Evolutionary Theory Seeks a Balance"

Theorists Debate How ‘Neutral’ Evolution Really Is

For 50 years, evolutionary theory has emphasized the importance of neutral mutations rather than adaptive ones at the level of DNA. Real genomic data challenges that assumption.

Art for "In the Nucleus, Genes’ Activity Might Depend on Their Position"
cell biology

In the Nucleus, Genes’ Activity Might Depend on Their Location

Using a new CRISPR-based technique, researchers are examining how the position of DNA within the nucleus affects gene expression and cell function.

Art for "‘Broadband’ Networks of Viruses May Help Bacteria Evolve Faster"

‘Broadband’ Networks of Viruses May Help Bacteria Evolve Faster

A newly discovered mechanism may enable viruses to shuttle genes between bacteria 1,000 times as often as was thought — making them a major force in those cells’ evolution.

Photo of mice
Abstractions blog

Unexpected Diversity Found in 16 New Lab Mouse Genomes

The availability of 16 new mouse genomes will help accelerate research into the genetic underpinnings of human traits and diseases.

Photo of ants holding larvae.

The Elusive Calculus of Insects’ Altruism and Kin Selection

How the ultra-cooperative behavior of ants, bees and other social insects could have evolved continues to challenge formal analysis. But a new theory about hedging bets against nature’s unpredictability may change the math and shift the debate.