So, what's going on inside that burger as it cooks? Well, it all comes down to the denaturation of proteins - basically, the proteins in the meat unwind and reorganize into a more solid structure. It's like a tiny, tasty science experiment happening right before your eyes. And the maillard reaction, a fancy term for the chemical reaction between amino acids and reducing sugars, is what gives your burger that golden-brown crust and caramelized flavor.
Grilled Burger Temperature Chart at Lyle Bowers blog
But here's the thing: thickness matters. Thicker burgers need more time to cook, while thinner ones can be done in a flash. And don't even get us started on the cut of the meat - a ground chuck burger will cook differently than a sirloin patty. It's a burger maze out there, folks.