I think that I cannot immediately see the route by which we should really understand memory and the workings of the brain.

There's a danger of some of the best people saying, 'I don't want a career in science.'

The aim of a nuclear-transplant experiment is to insert the nucleus of a specialized cell into an unfertilized egg whose nucleus has been removed.

I have this rather amazing report which, roughly speaking, says I was the worst student the biology master had ever taught.

Modern medicine has presented us with a Faustian bargain: Our aging bodies can bankrupt our children and grandchildren. We have run into the 'law of diminishing returns' in health care, where we are often doing more and more, with higher and higher technology, at more and more cost, for less and less benefit.

Human beings have survived for millennia because most of us make good decisions about our health most of the time.

I'd like to find and vote for a candidate, whether Republican or Democrat... that has the best interest in the health and welfare of everybody in this country.

I think the world should unite and focus on strong health systems to prepare the whole world to prevent epidemics - or if there is an outbreak, to manage it quickly - because viruses don't respect borders, and they don't need visas.