The countries represented in this image are from left to right , top to bottom : philippines , denmark , british honduras ; hong kong , madeira , kenya ; nepal , dominican republic , colombia .
On an island such as madeira , tourism is , to quote the european union 's european employment service , " the regional economy 's principal motor and greatest source of revenue " , even beyond its hotels .
He discusses subjects as diverse as pigeon breeding in ancient egypt , the rudimentary eyes of cave fish , the nest-building instincts of honeybees , the evolving size of gooseberries ( they 've been getting bigger ) , wingless beetles on the island of madeira and algae in new zealand .
A proposed hydroelectric dam on the madeira river ( a tributary of the amazon ) was denounced , and the country 's new oil find claimed for its people .