SpaceElements from the universe’s earliest stars gave birth to our sun It is easy to regard the sun as humdrum, yet it contains elements blasted from the universe’s first stars as they died and is halfway through its 9-billion-year lifespan Comment
EnvironmentCan higher CO2 levels boost plant life enough to dent global warming? Increasing carbon dioxide levels in the atmosphere may be boosting vegetation for now, but climate change is set to more than wipe out any gains, says James Wong Comment