Your blood keeps track of every virus you meet. Now a test can detect them all, perhaps exposing hidden infections or the causes of confusing conditions
They are some of the smallest vertebrates on land, but seven species discovered in cloud forests in Brazil could already be under threat from climate change
A process that wipes egg and sperm cells clean misses some genes out, explaining how your bad habits may affect the DNA of your children and grandchildren
Ten kids instead of three? That's one year gone. The UK Biobank death predictor tells you if your life expectancy matches your age, but not how to extend it
The case for using gut bugs to cure diseases is strong, but transplanting gut microbes for diseases that there's no proof it helps risks halting medicine's march