Pew Research Center’s survey on international knowledge covers facts about global leaders, international institutions and geography, among other topics. The following criteria are used to evaluate how ...

Given the wide usage and proven value of the Abbreviated Injury Scale (AIS) in rating severity of trauma, it is essential that certain reliability issues concerning its application be resolved. This ...

The pH of blood refers to how acidic it is. Changes to blood pH can signal underlying medical issues, including metabolic acidosis, respiratory acidosis, metabolic alkalosis, and respiratory alkalosis ...