We share our lives on this incredible planet with many other creatures, each of which has its own special trait or survival skill, a characteristic attribute by which it can be defined. Our special trick gives us the impression that we are in some way elevated above other animals, but of course we are not; it is important to remember that we are mammals, upright walking creatures, descended from an ancient line of apes believed to have originated in Africa. With a free thumb, we have the ability to fashion tools easily. It is believed that we have been making tools for more than 2.5 million years. Yet that does not define us. Other animals can make tools, too: sea otters use stones to break open oyster shells, and other primates even fashion weaponry for hunting.
What I believe defines us as human is our mastery of fire. Before we assume that we are the only users of fire in nature, we should think again. Just last year I watched hawks in Australia pick up burning sticks from a bushfire and drop them to spread the fire, flushing out or scorching potential prey. But no other creature has been found who can make fire at will.
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