Letter: Science is not fact, but theory
(World News Science)

Science is not something you `believe.` It is a continuously changing collection of theories generated by people in an attempt to understand how things work. The `scientific method` then requires that these theories be questioned in open debate and tested to see how well they explain things. Just because a `scientist` says something, it doesn`t become a fact. It is only an opinion. To be taken seriously causality must be demonstrated. How about the `theory` that masks are a critical...