From a human perspective, some strains are good, some are evil.
E. coli bacteria are the frequent culprits behind outbreaks of food-borne illnesses. But not all strains are harmful; some are even helpful.
The Viking landers in the 1970s were the last to look directly for life on Mars.
Planetary protection protocols try to make sure we don't seed places like Mars with life from our planet. An astrobiologist argues they're misguided – especially with human astronauts on the horizon.
Avoiding undercooked chicken meat or liver will help prevent infection.
Chicken meat is an extremely popular and affordable source of animal protein, and each Australian now consumes approximately 43 kilograms of it every year. But chicken is also uniquely prone to making…