A seven-million-year-old fossil may mark the moment our ancestors first stood up and walked.

When working with gridded data such as climate model output or reanalysis data it is often important to create regional averages, e.g., over countries, continents or regions defined in the literature.

Objectives Although osteonecrosis of the femoral head is a prevalent condition, its effects on gait parameters have not been thoroughly studied and are not well-established in the current literature.