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internal part of the land. In order to reach that point, it has to go the cor-
rect way when the river forks into branches. Salmon do not make any mis-
take in these choices and they always follow the correct stream.
Now suppose that you were born and had grown up in a house in a city.
Then one day you left your house, travelled for days and came to a place
1,500 km (930 miles) away from home. Years passed and you desired to re-
turn to your place of birth. Do you think that you could possibly remember
streets that you passed only once? While no human being could, salmon
can, and they always find their way completely accurately.
W O N D E R F U L C R E A T U R E S
