The curved shape of a zebrafish egg causes unequal cell divisions, creating larger cells near the animal pole and smaller ...

Over 130 mammal species can delay embryonic development, giving their offspring the best possible chance of survival in ideal ...

Insect wings represent a pivotal evolutionary innovation that has underpinned the remarkable radiation of the Insecta. This field, at the intersection of evolution and developmental biology (evo-devo) ...

Life begins with a single fertilized cell that gradually transforms into a multicellular organism. This process requires ...

"This volume is printed, after the author's death, as a memorial by his instructors, pupils, and friends in Princeton, Baltimore, and elsewhere. It consists of his thesis, reproduced from the copy ...