Nature - 1st prize
Cipriano Pastrano Delgado
ABC - Blanco y Negro
ABC - Blanco y Negro
01 January, 1994
The problem-solving capacity of rats can only be compared to that of humans, and they can swim without interruption for three days. Underneath the city streets they move around their own dark, humid labyrinth of sewers, cellars, pipes and air ducts. The human population of a modern city is outnumbered three to one by rats.