Overhearing all those stories of sickness at such an impressionable age left me feeling very vulnerable to bacteria, viruses, parasites, malignant cells, invasive fungi and poisons. Naturally ...

Yes, a poorly maintained water bottle can turn into a real nest of bacteria. So, before taking a sip, it is essential to know ...

For 20 years, astronauts have orbited Earth in what is essentially a sealed bubble- a meticulously maintained environment.