Every year, Nature awards prizes to senior researchers in the natural sciences for sustained and outstanding scientific mentoring of young researchers. There are two prizes, each worth €10,000 (US$12,500): one for lifetime achievement, one for mid-career achievement.

The competitions are organized on a country or regional basis. We shall give this year's accolades to researchers who live in the Nordic countries: Sweden, Norway, Denmark, Finland, Iceland and Greenland.

Nominations are now open, with a deadline of Monday 13 August. Each applicant should be nominated by five people who have been mentored by her or him over different periods. The forms for nominations, and other essential details about the competition, including the list of judges, can be found at go.nature.com/bxzc9y.