A retired German postal worker discovered the artifact in April 2015.
With 'Racing Extinction,' Discovery puts climate change center stage.
Canadian firm Lucara Diamond Company discovered the 1,111-carat stone in Botswana
After NASA said it found evidence of flowing water on present-day Mars, Rush Limbaugh and others spoke up with conspiracy theories.
A weekly compendium of the strange and wonderful, from five hand-picked reality shows.
Creature was found in refuse pit in 2006 and was probably used in 1683 Siege of Vienna.
NASA "did not expect to be this puzzled" by the appearance of two reflective lights on the protoplanet.
Astrophysicists cite orbit patterns, but some critics are not yet ready to believe.