What was pangea and how do we know it existed?

Pangea's existance was proven by the theory of continental drift, proposed by german meteorologist Alfred Wegener in 1912. The theory of continental drift proves that the earth is constantly moving, and that over millions of years, the continents broke apart from a single landmass called Pangea and moved to their current positions.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

other information encoded in your genes might distinguish you from the others in the group