I see a wiser person than when I was younger: having babies, and passing 30, were the turning points. What women in their 40s - I am 39 - lack in gorgeousness, they make up for in wisdom. I love ageing, despite the drawbacks - thinner, drier skin.

The way that we are going after ageing, I think, is a problem. The modern medical model is basically designed to attack one disease at a time. Independent of all other diseases and independent of the basic process of ageing itself.

I think ageing is challenging, surprising, fun, and full of friendship, so that is the approach I'll take, objecting to the stigmatization of ageing in so many modern societies.

City farming is not only possible, it is the very definition of the kind of meaningful, sustainable innovation we will need to meet the grand challenges of the 21st century: climate change; population growth; ageing population; urbanization; rising demand for energy, food and water; poverty; and access to healthcare.

Don't worry about ageing. It's a good indicator you're still alive.

Why do we appreciate the metamorphosis of the butterfly more than the beauty of ageing?

I see a wiser person than when I was younger: having babies and passing 30 were the turning points. What women in their 40s - I am 39 - lack in gorgeousness they make up for in wisdom. I love ageing despite the drawbacks - thinner drier skin.

Surely being a Professional Beauty - let alone an ageing one - is one of the most insecure and doomed careers imaginable.