As we move into space we're going to notice just how sensitive we are to our environment. It's like the higher rate of skin cancer among people with less melani

As we move into space we're going to notice just how sensitive we are to our environment. It's like the higher rate of skin cancer among people with less melanin - not noticed until people moved far away from where their ancestors lived. Gravity is more pervasive. It affects everything in biology and why shouldn't it? It's been a constant in the background that every direction evolution took transitively depends on.