Why were the early explorers of Antarctica all males?

The premise of your question is incorrect; early explorers of Antarctica were not exclusively male. Several women made significant contributions to the exploration and research of Antarctica, even during the early stages. Here are a few examples:

1. Caroline Mikkelsen: Caroline Mikkelsen was the wife of Norwegian explorer Carl Anton Larsen and accompanied him on several expeditions to Antarctica in the early 1900s. She made valuable observations and recorded daily life on these journeys.

2. Louise Arner Boyd: American biologist Louise Arner Boyd participated in the Ronne Antarctic Research Expedition (RARE) in 1947-1948. She conducted important studies on the behavior and ecological interactions of Antarctic seals and birds.

3. Patricia Robinson: Patricia Robinson was a British glaciologist who became the first woman to lead a winter-over team in Antarctica during the British Antarctic Survey (BAS) in 1969. She made significant contributions to the understanding of Antarctic ice dynamics.

4. Susan Peterson: American chemist Susan Peterson was part of the first all-women expedition to Antarctica organized by the National Science Foundation (NSF) in 1974. Her research focused on atmospheric chemistry and pollution.

5. Marie Tharp: Although not an explorer who visited Antarctica directly, Marie Tharp was a crucial contributor to the understanding of Antarctic geography. As an oceanographic cartographer, she worked closely with oceanographer Bruce Heezen and co-created the first accurate map of the ocean floor, revealing the existence of the mid-ocean ridge and transforming the field of marine geology.

These are just a few examples of the many remarkable women who have made significant contributions to the exploration of Antarctica. Female scientists, explorers, and researchers have played vital roles in advancing our understanding of the Antarctic region and its ecosystems throughout history.