ANSWER
Two different species of mice migrated to the river from different directions.
EXPLANATION
Solved scientifically in my head.
Cat's personalities and dog's personalities are often considered calming to humans.
The basketball team won every game so far
Based on the NPR series of the same name, This I Believe features 80 Americans--from the famous to the unknown--completing the thought that begins with the book's title. The pieces that make up the program compel listeners to re-think not only what and how they have arrived at their own personal beliefs,