This study documented wild edible plant diversity and traditional knowledge in northern Ethiopia. Forty species were identified, mainly trees and shrubs. Knowledge varied by gender, age, and occupation, with key informants showing greater expertise. Wild plants provide critical seasonal food security but face threats from deforestation, agriculture, and overgrazing.

This study examines cognitive reserve theory by investigating the relationship between education and cognitive performance across developed and developing countries. Using numeracy and verbal fluency measures, it finds that higher education consistently improves cognition. However, cognitive performance is largely similar across countries once education level is considered, challenging assumptions about educational quality differences.