It’s also normal to have some differences in size and shape between your own two breasts. What is concerning is if you notice ...

When people exceed these guidelines, the heart may remodel itself in response—that is, it begins to change its size and shape ...

This article was originally published with the title “ The Size and Shape of Atomic Nuclei ” in Scientific American Magazine Vol. 221 No. 2 (August 1969), p. 58 doi:10.1038 ...