Many of the river valleys are fossilized with salt pans.

Amber, fossilized tree resin, is one of Latvia's most important cultural symbols.

Ruthless leaders mobilize disoriented followers.

According to Dawson, workmen at the site discovered the skull shortly before his visit and broke it up in the belief that it was a fossilised coconut.

Poverty has exacerbated the trauma of Iraq s violent history of wars and atrocities, which has desensitized people to killing.

However, since the middle of the 20th century it has been known that the primitive cockroach insects found fossilized in Palaeozoic strata are the forerunners not only of modern cockroaches but also of mantises and termites.

A group of dedicated young men and women walk very slowly out across vast areas of Africa, looking for small fragments of bone, fossil bone, that may be on the surface.