How do scientists know so much?

They spent a lot of their youth studying the subject.

Scientists know so much because they went to collage to become scientists and they spent years learning and studying whatever that scientists does.

Explanation:

of what agreement it does not show

american political culture includes a plenty of focus views and preferences. not all westerns experience the same opinions, of course, but the large preponderance promises to these general ideas, including equality, justice, freedom, individualism, integrity, and difference.

the united states is a democratic republic. residents elect representatives to governmental, nation, and local administration; those deputies create the regulations that command u.s. community. although emptiness in u.s. law needs it, in usage, the administrative system is ruled by executive factions.