It is inevitable that there will come a time when mankind will go out more at night and stay indoors during the day to avoid harmful solar rays.

Here's how man thinks: "If no one's done it, why should I try? It's a waste of my time; but if he's done it, I can do it better.

if "now" is said, it would instantly be in the past.

Once "now" is said, it's already in the past.

There is no such thing as weak competition, it grows all the time.