Philosophy consists of quantifying and/or asking questions about the nature of life, existence, reason, etc. At some point, a philosopher said "hmm, these little thought experiments are cool and stuff, but I want to actually apply them IRL" and then you got this guy who set out to see if he could prove things based on what his thought experiments produced as most likely (ie a hypothesis). At some point way down the line, philosophers who set out to prove their ideas realised that they had to come up with a way to prove, that without a doubt, that their findings were 100% true and verifiable, thus you have people like Bacon, Galileo, Copernicus, and probably many others, who aided in the creation of what we now call the "scientific method". The moment the scientific method was created, was the day that philosophers started branding themselves as scientists.
tldr, science wouldn't exist without philosophers, and in a way, all scientists are philosophers.