Christopher Nolan’s Interstellaris a hugely popular sci-fi movie that plays with many complex ideas in order to tell its story of human courage and cosmic purpose. The film stars Matthew McConaughey ...

In 2017, ‘Oumuamua appeared in the sky as the first confirmed interstellar object. We still aren't entirely certain what ‘Oumuamua was—though we can be mostly certain it wasn't an alien spacecraft.