The Trump administration on Thursday revoked a scientific finding that long has been the central basis for U.S. action to regulate greenhouse gas emissions and fight climate change, the most aggressiv...

She made key contributions to US cold-war science despite facing huge barriers as a Black woman.

Alt: a man (jeff foxworthy) is holding a microphone and saying `` here 's your sign '' while standing on a stage .

Alt: The scarecrow from the wizard of oz says to dorothy , “ if i only had a brain.”