onsustainability.com

Natalie Angier from the New York Times reports…

If you wanted to push yourself to the outermost chalk line of human endurance, you might consider an ultramarathon, or a solo row across the Atlantic Ocean, or being nominated to the United States Supreme Court. Or you could try studying the long-beaked echidna, one of the oldest, rarest, shyest, silliest-looking yet potentially most illuminating mammals on earth. More….