The difficulty is in seeing Science as a philosophy. Ultimately, scientific observation is just recording; thinking about what the observations mean, that's philosophy.
But we've made the distinction between "scientific" and "philosophical" thinking for so long that we see them as two separate fields of endeavour (when they are actually two parts of the same field of endeavour).
Science is accurate observation and record-keeping; Philosophy is analysis of the records and looking for meaning and pattern. The latter is seen (nowadays) as a part of Scientific endeavour. Most scientists would not admit they're philosophers. But that's what the words used to mean (and still do, really).
