A new study by researchers in Japan offers new insights into how protocells may have inherited and enriched genetic material before modern biology emerged. By exposing mixed phospholipid vesicles to repeated freezing and thawing, the team found that vesicles with more unsaturated lipids grew more efficiently and became selectively enriched. This membrane-level selection also increased the fraction of selectively neutral genetic material trapped inside.

In the icy waters of Alaska’s Bristol Bay, beluga whales rely on an unexpected survival strategy: sharing mates over many years. Long-term genetic and behavioral research reveals a polygynandrous system where both males and females spread reproductive opportunities, creating networks of half-siblings. This approach boosts genetic diversity, reduces inbreeding, and protects the population from genetic drift – showcasing how cooperation, choice, and time help sustain resilience in a small, isolated whale community.

How do feral horses maintain inter-group boundaries in an open field without territories?

Babies of every species from mouse to human rapidly forget things that happen to them—an effect called infantile amnesia. A type of brain immune cell called microglia might control this type of forgetting in young mice, according to a study published January 20^th in the open-access journal PLOS Biology by Erika Stewart, from Trinity College Dublin in Ireland, and colleagues.

Scientists have found that blocking microglia (specialist immune cells in the brain) prevents infant forgetting (“infantile amnesia”) and improves memory in mice, suggesting that microglia may actively manage memory formation and dictate what, and when, we forget. Infants of many species from mouse to human rapidly forget things that happen to them—a phenomenon called infantile amnesia, but until now we have known little about how this happens. The new discovery, just published in leading international journal PLOS Biology, now offers strong support for the mechanism at play.