Nature - 1st prize
Cipriano Pastrano Delgado
ABC - Blanco y Negro
ABC - Blanco y Negro
01 January, 1994
Their prodigious rate of reproduction enables a female rat to have up to seven litters in a single year. The human population of a modern city is outnumbered three to one by rats. Underneath the city streets they move around their own dark, humid labyrinth of sewers, cellars, pipes and air ducts.