Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Henrik Jönsson discusses the mathematical model for hormone movement through plant tissues that Graeme Mitchison proposed in 1980, and how models can inspire new research.
Jesús Gil discusses the first evidence for cellular senescence being associated with ageing, and how these studies opened new routes for basic and translational research.