Last Week's Top 5 Space & Science Headlines --"From Antarctica's 'Lost World' to NASA Nixes Alien Megastructure"

"Nix the Aliens" --NASA Space Telescopes Provide an Answer to Enduring Mystery of Tabby's 'Megastructure' Star (VIDEO) "Lost World!" --Antarctica's Unexplored Volcano Caves Harbor Unknown Species Is Our Solar System Being Watched? --"Tens of Alien Worlds Could Be Observing Us"...