
Is food really better from the farm gate than supermarket shelf?
14 October 2015
Some say the way we produce and process food making it less nourishing than in our grandparents' day. 91av looks at the facts

14 October 2015
Some say the way we produce and process food making it less nourishing than in our grandparents' day. 91av looks at the facts

16 September 2015
From party planets to egg worlds, astronomers are hunting exoplanets even more bizarre than the ones they have spotted already

29 July 2015
We're fixated on the idea that life can only exist on a planet like Earth – but the most likely habitat might lie elsewhere

10 June 2015
How many solar system planets are there: eight, nine? Or 73 or 74? Arguments swirl on nine years after Pluto was struck off the official list

10 June 2015
Rivers of neon, geysers of nitrogen, an oddly giant moon: the New Horizons probe promises revealing spectacles – and insights into deep solar system history

10 June 2015
One frozen ammonia world is too large even to be a moon, and no one can work out how four others got there. What's their story?

6 May 2015
Comet 67P's water isn't like Earth's – it's interstellar stuff, from the same mould as the pristine material that made the solar system

29 April 2015
Extraterrestrials could already be learning about life on Earth. Problem is, it's probably from TV signals transmitted in 1973…

12 March 2014
We thought that the search for life on other planets meant finding Earth's twin. But now it looks like some bizarre worlds could still be fit for life

28 August 2013
The race is on to tap the world's biggest and most unusual fossil fuel supply – methane trapped in frozen hydrates in permafrost and at the bottom of the ocean