In this Journal club, Meritxell Huch recalls a dogma postulated by Hayflick in 1961, that the capacity for propagating primary epithelial cells with normal ploidy is limited — a theory that persisted until the advent of organoid cultures.

Sérgio Pena discusses a 2019 study by Gruhn et al., which showed that meiotic chromosome segregation errors originating in oocytes determine the curve of female fertility in humans.

Selene Fernandez-Valverde recalls a seminal publication by Jacob and Monod to showcase how thoughtful reasoning and extrapolation of limited observations can provide meaningful insights into complex systems.

Two new studies in Nature Biotechnology describe cellular recording systems that incorporate time-resolved optical signals into self-assembling protein filaments.

In this Journal club, Meritxell Huch recalls a dogma postulated by Hayflick in 1961, that the capacity for propagating primary epithelial cells with normal ploidy is limited — a theory that persisted until the advent of organoid cultures.

A study in Nature reports comprehensive, genome-wide mapping of the human methylome that provides mechanistic insights into gene regulation and offers great potential for analysis of cell-free DNA.

Lacaze et al. caution against the use of polygenic scores alone for population screening in the absence of monogenic testing.

Sérgio Pena discusses a 2019 study by Gruhn et al., which showed that meiotic chromosome segregation errors originating in oocytes determine the curve of female fertility in humans.

Selene Fernandez-Valverde recalls a seminal publication by Jacob and Monod to showcase how thoughtful reasoning and extrapolation of limited observations can provide meaningful insights into complex systems.