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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.
The structure of DNA: Cooperation and competition
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.

A science toolkit
A science toolkit
Get the tools you need to take a scientific approach to life.
Science talk
Frances Ashcroft
"Science is simply solving puzzles; it needs imagination and determination."
— Physiologist and geneticist Frances Ashcroft, for Acclaim
Cold fusion
Everything you need to know about the nature and process of science Your science toolkit Why science matters Science and society Science as a human endeavor Scientific evidence How science works What is science? Introduction: Science in a nutshell
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Understanding Science was developed by the University of California Museum of Paleontology in collaboration with its Advisory Boards.

National Science Foundation
Funded by the National Science Foundation under Grant No. EAR-0624436. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF).

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