Giving Quote by Jules Verne

The history of science shows that theories are perishable. With every new truth that is revealed we get a better understanding of Nature and…

— Nikola Tesla

A valid scientific theory is predictive, verifiable, and replicable. To me, that's beautiful.

— Dean Ornish

“Theory in any branch of science entails a risk of detachment from reality”

— Quammen, David

“Real science is recognizing an outcome, not always about reinforcing your theory.”

— Jeffrey Fry

“The way of science is paved with discarded theories which were once declared self-evident;”

— Karl R. Popper

We have reached a situation where a theory has been accepted as fact by some, and possible contrary evidence is shunted aside. [This is]…

— Robert Shapiro

At any one time there is a natural tendency among physicists to believe that we already know the essential ingredients of a comprehensive theory…

— Val Logsdon Fitch

Theory is good; but it doesn't prevent things from existing.

— Jean-Martin Charcot

Although scientists can often be as resistant to new ideas as anyone, the process of science ensures that, over time, good ideas and theories…

— Dean Ornish

Science may eventually explain the world of How. The ultimate world of Why may remain for contemplation, philosophy, religion.

— Liberty Hyde Bailey

The end of science is not to prove a theory, but to improve mankind.

— Manly Hall

Theory, from whatever source, is not perfect until it is reduced to practice.

— Hosea Ballou