The 1908 Siberian meteorite explosion brought about considerable depletion of the northern hemisphere's ozone layer.

Many political radicals advocated that women should not be discriminated on the basic of their sex.

The famous racehorse Secretariat had to be destroyed because of a painful, incurable hoof disease.

Adverse reviews in the New York press may greatly change the prospects of a new Broadway production.

Perhaps more than anything else, it was onerous taxes that led to 'the Peasants' Revolt in England in 1381.

He was fired because of his misconduct at the office party.

Scientists warn of the impending extinction of many species of plants and animals.

Most of the school-leavers are sanguine about the idea of going to work and earning money.