Here's an interesting topic for discussion, not without a little controversy. It's quite topical too for those who have read the Da Vinci Code. The number phi (?)keeps recurring in terms of dimensional ratios in living organisms. This fact was recognized by Leonardo Da Vinci, who used the golden ratio to great advantage in his drawings and paintings.
How can we explain this phenomenon, and would there be parallels on Mars? Would local gravitational conditions change the golden ratio for hypothetical Mars-based life. If mankind settles on Mars, would we evolve towards having body parts conforming to this new ratio (?)?