The thing about a bush baby is that the male establishes its territory by peeing on his hands and putting it all on the walls. And after you've had a… - David Attenborough

In the south west of India lies the long narrow coastal state of Kerala. Most of its thirty-two million inhabitants live off the land and the ocean, a rich tropical ecosystem watered by two monsoons a year. It's also one of India's most crowded states - but the population is stable because nearly everybody has small families... At the root of it all is education. Thanks to a long tradition of compulsory schooling for boys and girls Kerala has one of the highest literacy rates in the World. Where women are well educated they tend to choose to have smaller families... What Kerala shows is that you don't need aggressive policies or government incentives for birthrates to fall. Everywhere in the world where women have access to education and have the freedom to run their own lives, on the whole they and their partners have been choosing to have smaller families than their parents. But reducing birthrates is very difficult to achieve without a simple piece of medical technology, contraception. m35s09-m38s21

The battle between cuckoos and other birds is a continuing one. The cuckoos developing new stratagems and perhaps finding new victims, and the victims finding new defences.

And yet, today the harbour is silted up, most of the city lies buried beneath sand dunes and the land has become a desert. As the population had grown and more people wanted more fields, so more of the forest that once stood around the city was cut down, until eventually it was all gone. With no roots to hold the soil, and no attempt to conserve it, it was carried away by the wind and the rain.