Bad week in social media gets worse; Twitter hammered PlayThe Associated PressWATCH Facebook stock plummets nearly...

Twitter denies conservative 'shadow banning' claims, but alters search function PlayAndrew Harrer/Bloomberg via Getty Images FILEWATCH...

Twitter says it doesn't 'shadow ban' after Trump tweet PlayChris Ratcliffe/Bloomberg via Getty ImagesWATCH Trump tempers...

Water is buried beneath Martian landscape, study says PlayThe Associated PressWATCH Chinese space station enters the...

New species of dinosaur dubbed the 'amazing dragon' discovered in China PlayZhang Zongda/ReutersWATCH A Look Inside...

Drought spurs extreme measures to protect West's wild horses PlayRick Bowmer/APWATCH Severe weather from coast to...

Gala opens countdown to 50th anniversary of 1st moon landing The Associated PressThe black-tie Apollo Celebration...

Fiat Chrysler chooses Jeep exec Manley to replace ailing CEO The Associated PressFILE - In this...

Newly released video shows man believed to be last of tribe The Associated PressBEST QUALITY AVAILABLE...

One giant sale: Neil Armstrong's collection goes to auction The Associated PressFILE - In this July...