What is quantum physics?

You ask: What quantum physics?

Caveman shrink eye down small, smaller than dust, down to atom bits — so small that if Caveman puff one apple up big as whole Earth, the atoms inside grow only big as that first apple. Down there, world act strange. Tiny bit not solid pebble — it act like ripple on river AND like lump, both same time. Energy come in fixed chunks, never smooth — like Caveman throw whole rocks, never half rock. Tiny bit live in many maybes at once. When Caveman look, maybes squash into one answer, picked by chance, like which way dropped spear fall. And Caveman cannot know where bit sit AND how fast it run together — pin one, other go blurry. Not Caveman too dumb — bit itself not decided till poked. Cave wisdom: small world play dice, not solid like big rocks Caveman hold.