Harvard physicist: ‘Serious possibility’ alien spacecraft visited solar system
https://www.google.com/url?rct=j&sa=t&url=https://www.wpri.com/dont-miss/harvard-physicist-serious-possibility-alien-spacecraft-visited-solar-system/&ct=ga&cd=CAIyGjhkNWEwOGZjMjBkZTUxYzc6Y29tOmVuOlVT&usg=AFQjCNESXh5FRBEg4PlvveCd29GN3YQ12g In his new book “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth,” he argues that the interstellar mystery object was likely similar to a light sail — a method of spacecraft propulsion — created by extraterrestrials.