The Careers feature ‘Teen spirit in the lab’ (Nature 554, 559–561; 2018) wrongly stated that CERN has 12 member states. In fact, it has 22.

The Careers news story ‘PhD career paths hold promise’ (Nature 555, 277; 2018) gave the wrong year for the start of the PhDs Project. It started in 2000, not 2002.