Which might be why Archer said this:Strange analogy, one we can't relate to. (Very few have seen a gazelle being born in Africa.)
When I was in my early twenties on a trip to East Africa, I saw a gazelle giving birth. It was truly amazing. Within minutes, the baby was standing up—standing up on its own. A few more minutes, and it was walking. And before I knew it it was running alongside its mother, moving away with the herd.
Archer's statement doesn't require the listener to have seen a gazelle giving birth. Its not about the birth, but what happened afterwards. Archer was contrasting the gazelle calf's ability to join the herd and run right after it's birth with humanities slow, learn as you go approach to space travel. The point was humans are not like gazelles. The gazelles are not analogous to humans.