I am one of those scientists who feels that it is no longer enough just to get on and do science. We have to devote a significant proportion of our time and resources to defending it from deliberate attack from organised ignorance.

Scientists worldwide agree that the reduction needed to stabilize the climate is actually more like 80 percent.

Some dreamers demand that scientists only discover things that can be used for good.

The scientist is motivated primarily by curiosity and a desire for truth.

Facts are the air of scientists. Without them you can never fly.

When I find myself in the company of scientists I feel like a shabby curate who has strayed by mistake into a room full of dukes.

I am not a scientist. I am rather an impresario of scientists.

If an elderly but distinguished scientist says that something is possible he is almost certainly right but if he says that it is impossible he is very probably wrong.

Touch a scientist and you touch a child.

Of course Einstein was a very great scientist indeed and I have enormous respect for him and great admiration for the discoveries he made. But he was very committed to a view of the objectivity of the physical world.