HealthOrlando massacre prompts call to ease gay blood donor rules As people rush to give blood to treat those wounded in the attack, campaigners say rules requiring gay men to be celibate for a year before donating are unscientific ¿ìè¶ÌÊÓÆµ
HumansCan video games really create new knowledge?In Knowledge Games Karen Schrier argues that games can tackle some of the thorniest problems, from global warming to lack of food and clean waterCulture