Science in Action See more stories... Cells within cells: An extraordinary claim with extraordinary evidence

Learn how an unlikely idea — that the merging of cells played a prominent role in evolution — overcame strong initial resistance within the scientific community and came to be an accepted part of evolutionary theory. Learn how an unlikely idea — that the merging of cells played a prominent role in evolution — overcame strong initial resistance within the scientific community and came to be an accepted part of evolutionary theory. The structure of DNA: Cooperation and competition

Knowing the structure of DNA has helped push biology into new realms. Find out how the human side of science played out in this remarkable discovery. Knowing the structure of DNA has helped push biology into new realms. Find out how the human side of science played out in this remarkable discovery. Try out the new How Science Works Web Interactive! Chart your own course through the process of science with our interactive journaling tool.

"The scientific mind does not so much provide the right answers as ask the right questions."

 Anthropologist Claude Lévi-Strauss