The issue focused on an image of the research study. (The study's research design is published in the journal Science).

The study's research design is no longer available on the study's website, but the study's research project page is still available.

The study's research design is part of a study on the evolution of human brain size. (The study's research design is available on the study's website.)

The study's research design is also part of a study on the evolution of