Bears can sniff out human food with impressive efficiency. Consider: A bloodhoundâs nose is equipped with about 230 million olfactory cells (scent receptors). Thatâs 40 times the number in humans. It is estimated a bearâs nose is just as sensitive as a bloodhound (if not more so).
Countries that border Mexico are Belize, Guatemala and the United States. The bodies of water it borders are the Caribbean Sea, the Gulf of Mexico, and the North Pacific Ocean.
he United States and Canada span most of North America, stretching from the Pacific Ocean to the Atlantic.These two huge countries share many physical features.Mountains frame their eastern and western edges,cradling a central region of vast plains. When people first arrived on these plains,they found an immense