The Athenian Agora. The Agora of Athens was the center of the ancient city: a large, open square where the citizens could assemble for a wide variety of purposes. On any given day the space might be used as a market, or for an election, a dramatic performance, a religious procession, military drill, or athletic competition.
Bear spray is a non-lethal bear deterrent designed to stop aggressive behavior in bears. Its use can reduce human injuries caused by bears and the number of bears killed by people in self-defense.
Since each hair on a polar bears body is made out of keratin, it absorbs ultraviolet light from the sun. What the keratin does is provide extra warmth for the skin. On further note, polar bear fur is water repellant, and the hair does not mat when it is wet.