I regard it as ethically unacceptable and impractical to censor any aspect of trying to understand the nature of our world.

Reliable scientific knowledge is value free and has no moral or ethical value. Science tells us how the world is. ... Dangers and ethical issue arise only when science is applied as technology.

Both Newton and Darwin were driven by the data and were forced to recognize that they couldn't explain everything. It may be a characteristic of great scientists to know what to accept and what to leave out.

It is not birth, marriage, or death, but gastrulation which is truly the most important time in your life.

I regard it as ethically unacceptable and impractical to censor any aspect of trying to understand the nature of our world.

The image of the disinterested, dispassionate scientist is no less false than that of the mad scientist who is willing to destroy the world for knowledge.

The physics of motion provides one of the clearest examples of the counter-intuitive and unexpected nature of science.