Sure, science involves trial and error. Scientists refine theories each day. But as they do, they help us grasp more clearly the wonders of the world and the universe.

The U.S. has the finest research scientists in the world, but we are falling far behind other countries, like South Korea and Singapore, that are moving forward with embryonic stem cell research.

The future, according to some scientists, will be exactly like the past, only far more expensive.

The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.

Scientists and creationists are always at odds, of course.

In 1947 I defended my thesis on nuclear physics, and in 1948 I was included in a group of research scientists whose task was to develop nuclear weapons.

I think that cognitive scientists would support the view that our visual system does not directly represent what is out there in the world and that our brain constructs a lot of the imagery that we believe we are seeing.

I appeal to my fellow scientists to remember their responsibility to humanity.

But scientists on both sides of the iron curtain played a very significant role in maintaining the momentum of the nuclear arms race throughout the four decades of the Cold War.

At a time when science plays such a powerful role in the life of society, when the destiny of the whole of mankind may hinge on the results of scientific research, it is incumbent on all scientists to be fully conscious of that role, and conduct themselves accordingly.

However, I believe that it would be difficult to have legitimate scientists agree to participate.

The Nobel Prize, so long regarded in our science as the highest reward a man's work can earn, must bring to its recipient a most solemn sense of his debt to his fellow scientists and those of the past.

Drug use, within entire teams continues unabated. It is planned and deliberate cheating, with complex methods, sophisticated substances and techniques, and the active complicity of doctors, scientists, team officials and riders. There is nothing accidental about it.

I also think we need to maintain distinctions - the doctrine of creation is different from a scientific cosmology, and we should resist the temptation, which sometimes scientists give in to, to try to assimilate the concepts of theology to the concepts of science.

My title is intended to suggest that the community of scientists is organized in a way which resembles certain features of a body politic and works according to economic principles similar to those by which the production of material goods is regulated.