10/10/2016
...logical, our scientist friends test those theories to see if they hold up! When they test a theory they come up with a hypothesis – something they expect will be true but that they want to test. In fact, one theory that you may have heard of is the ‘Hygiene hypothesis.’ This is based on the idea that, in western societies like North America, our environments (home, school, work, the kitchen counter) are very clean....