So, what Alien: Earth is saying is Weyland-Yutani is aware of xenomorphs (among other creatures) well before the events of the films and was *this close* to getting one back to Earth.

The Alien franchise is finally making the leap to TV with Alien: Earth, an FX and Hulu series that takes the terrifying Xenomorphs down to Earth for the first time. It’s a big change from the usual isolated spaceships and deep-space horror we’re used to,

Noah Hawley's daring exploration of the Alien universe makes for a great sci-fi TV show that asks big questions without neglecting the fun factor.