The vaccine appeared safe and effective, but some participants falsely tested positive for HIV.
The vaccine appeared safe and effective, but some participants falsely tested positive for HIV.
Horned dinosaurs’ weapons evolved to handle the forces of combat 
Artemis II results show how much science people can do at the moon 
Crossword: Time lines 
Many American diets may not include enough of this essential nutrient 
A telling hole in a Neandertal bone hints at a bitter end 
Brain implants are helping people who’ve lost their voice 
COP17: The world has a plan to save nature. Is it working? 
Flour sacks turned flood barriers: Gaza faces another winter without safe shelter 
WHO scales up Ebola readiness in 22 countries across three continents 
Ukraine: Civilian casualty rates among ‘deadliest’ in years, as energy attacks intensify