What realm of science were the Mayans "masters" of? What evidence do we have that shows proof of that?

Astronomy and math.

Explanation:

Mayans were masters in the field of astronomy and math and these evidences are witnessed in the calendars made by them at ancient times. This ancient Mayans culture also use the concept of zero in mathematics which enable them to count the numbers up to millions. By using the concept of sophisticated mathematical system which was developed by them, Maya developed an accurate calendars in ancient times.

hitler was elected as a strong leader by germans who felt angry following the treaty of versailles.

each played a major role in ending the cold war.