The once-science-fiction notion of hyper-connectivity - where we are all constantly connected to social networks and other bubbling streams of digital data - has rapidly become a widespread reality.

Science is, rightly, searching for drugs to arrest ageing or to slow the advance of dementia. But the evidence suggests that many of the most powerful factors determining how you age come from what you do, and what you do with others: whether you work, whether you play music, whether you have regular visitors.

The really interesting moment will be when you have a critical mass of people engaging through the networks, more than through the press and TV. When that happens, the culture of politics has to change, moving away from controlled one-way messages towards a political culture that is more questioning.

I didn't much like being in Parliament physically. I found it a bit depressing. It's very dark and heavy. I like being out and about.

Huge sums are invested globally in medical research and development - and with good reason.

A modest dose of self-love is entirely healthy - who would want to live in a world where everyone hated themselves? But taken too far it soon becomes poisonous.

All over the world, social innovation is tackling some of the most pressing problems facing society today - from fair trade, distance learning, hospices, urban farming and waste reduction to restorative justice and zero-carbon housing. But most of these are growing despite, not because of, help from governments.