Some of our best science stories from 2014. Comet landings, Ebola outbreaks, retracted stem cell studies, faecal transplant capsules and more!

Rosetta arrives at the comet, an uncontacted tribe gets influenza, and a bacteriophage is the most common virus in your body. Plus, how bears overeat but don’t get diabetes, a year long microbiome study, and crazy octopus sex!

Tree-hugging koalas stay cool, gum tree genome sequenced, and ISEE-3 probe returns after 36 years. Claims of the Turing test being passed, the affects of gut bacteria on malnutrition and an ark for yeast cultures.