From the sky, from under the earth, from far away in the sea, comes disaster.
We build and invent new things - and sometimes bring disaster upon ourselves.
Today, television and the Internet mean that we can watch disasters as they happen, and see their terrible results.
From Pompeii to the Asian tsunami, from the Great London Fire to Chernobyl, the stories of disasters are frightening, but they have much to tell us.
Disasters bring stories of fear, grief, loss and death - but also of people whose extraordinary courage and feeling for others will touch your heart.