Artificial intelligence is everywhere. But before scientists trust it, they first need to understand how machines learn.

Brand and colleagues show that increased tumour lactate dehydrogenase A (LDHA)-mediated lactic acid production dampens activation and cytokine production of infiltrating T and natural killer (NK) cells allowing tumours to escape immune detection and promoting tumour growth.

Having an impressive CV is one thing, but a well-written covering letter can really make you stand out from the crowd.