Silhouettes of smokestacks against an orange sunset sky

Researchers create new roadmap for calculating the social costs of carbon

Tristan Harris speaking on stage

'Social Dilemma' star on fighting the disinformation machine

 Margaret Keenan, 90, of Coventry, England, is first person to receive the Pfizer COVID-19 vaccine.

Prioritizing oldest for COVID-19 vaccines saves more lives, years of life