Free energy from the air. It sounds like a fantasy but that is what entrepreneur Lord Drayson has just unveiled at London's Royal Institution.

The UK has 34 universities in the Times Higher Education ranking of the world's top 200 institutions, with Oxford climbing to second best globally.

A satellite designed to provide high-speed internet services to 200,000 Australians living in rural areas is launched from South America.

Modernising Africa's agriculture sector to attract young people will help tackle youth unemployment and food insecurity, a report suggests.

Former Labour science minister Lord Drayson says his government made a mistake in promoting diesel cars as they are "killing people".

Zimbabwe is to ban electric water heaters and require all new properties to use solar power, in an attempt to tackle big power shortages.

As England prepares to introduce a charge for plastic bags - long after many other countries - David Shukman catches up on the latest research into plastic in the oceans.

Pluto's major moon, Charon, takes centre stage in this week's release of new pictures from the New Horizons mission.