Compare Galileo's experimental approach to investigating the rate at which heavy and light objects fall and Aristotle's approach, based on reason alone. Scientific knowledge is subject to change. It does not claim to be truth in an absolute and final sense. This does not lessen the value of knowledge for the scientifically literate person. Our views since 1900 of atomic structure have changed considerably for this reason.
Scientific knowledge is a product of humankind.
It involves creative imagination. The knowledge is shaped by and from concepts that are a product of culture. The use of biotechnology has resulted in changes in rapeseed to remove erucic acid. This has led to the development of improved varieties of canola oil for human consumption.