In this week's programme we'll be getting an update on the gigantic atom-smasher buried deep under the Swiss-French border, the Large Hadron Collider, and finding out from Welshman, Dr Lyn Evans, behind the project how soon it'll be up and runnign again after a major fault.

We'll also be asking what ships logs form two hundred years ago can tell us about climate chage and global warming in the 21st Century. Dr Dennis Wheeler of the University of Sunderland talks to Adam Walton about the CORRAL project he leads, which includes the log books of Charles Darwin's voyage on the Beagle and Captain Cook's great expeditions.

The Science Café team enjoys a challenge and we're happy to try to answer any of you questions. This week listener Tom Ellis asks a question about the human brain which we hope is fully answered by Dr Alan Beaton of the Psychology Department at the University of Swansea.

And our last item is a look at solar energy and in particular the research done at the Centre for Solar Enargy Research in St Asaph, North Wales. Cloudy, rainy Wales is leading the world in the technology of solar power. But sadly, though researched, designed and manufactured here, much of the work is then exported. Countries like Germany and Spain are far more interested in installing this green and money-saving option than the Welsh themselves.