3. What were some of the materials use in ancient history times in the
making of the ball?

Fur stuffed with feathers.

Explanation:

Ball games were popular throughout ancient history but also in the Middle Ages. Many of these games are the forerunners of today's American football and soccer. There are data on almost all continents on how peoples practiced some ball sports in antiquity. The game balls' look was not like today, it was mostly egg-shaped, and the materials for making it were different. The most common material for making the ball was leather, which was filled with feathers.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue