[wolf78]

I missed that in physics class.

High schools usually don't teach general relativity and advanced cosmology.

Why do they require that?

General relativity and instable universe as evidenced by astronomical redshift, stellar nucleosynthesis of heavier elements etc.

[steve-b]

High schools generally do teach enough astronomy to demonstrate that much of what we see is more than 6000 light-years away (and therefore existed more than 6000 years ago in order to be seen at all).

[Jaime2099]

General relativity and instable universe as evidenced by astronomical redshift, stellar nucleosynthesis of heavier elements etc.

If you're talking about the Big Bang Theory, then say hi to the Tooth Fairy and the Easter Bunny for me. If not, then I apologize.