The moment a student blinks his eye, he's already way off. The moment he tries to think, he's already differed. The moment he arouses a thought, he's already deviated. But for the man who understands, it's always right there before his eyes.
Global warming, along with the cutting and burning of forests and other critical habitats, is causing the loss of living species at a level comparable to the extinction event that wiped out the dinosaurs 65 million years ago. That event was believed to have been caused by a giant asteroid. This time it is not an asteroid colliding with the Earth and wreaking havoc: it is us.