UFO expert says people 'have been ready', demands government to 'show the alien'

Astrophysicist Neil deGrasse Tyson has renewed calls for greater government transparency on alleged extraterrestrial evidence ...

Neil deGrasse Tyson urges US government to 'show us the alien', says public won't freak out ...

Astrophysicist Neil deGrasse Tyson has challenged the US government to move beyond hearings, testimony and document releases ...