Indonesia wants to clean the Citarum
The Indonesian government has a new challenge: cleaning "the world's most polluted river".
And even more
The quokka is the only land mammal living on this island
This squirrel's fur is fluorescent under ultraviolet light
How do giraffes fight?
Drugs and pesticides: a pollution invisible to the naked eye
Birds are shrinking in size because of global warming
Iceberg Alley is the perfect spot for iceberg viewing