QUESTION: answer this: which gas most likely was not part of earth's early atmosphere??

ANS: Oxygen

QUESTION: answer this: when does arrow season 6 air on tv??

ANS: October 12, 2017

QUESTION: answer this: who wins season 12 of americas next top model??

ANS: Teyona Anderson

QUESTION: answer this: what song did aerosmith have a hit with twice??

ANS:
"Walk This Way"