“Imagine the Earth devoid of human life, inhabited only by plants and animals. Would it still have a past and a future? Could we still speak of time in any meaningful way? The question “What time is it?” or “What’s the date today?” if anybody were there to ask it would be quite meaningless. The oak tree or the eagle would be bemused by such a question. “What time?” they would ask. “Well, of course, it’s now. The time is now. What else is there?”