Alien life forms:

odoriferous: death breath: foul going in, foul coming out

tentacles scales spikes splotches...slime

gills and two hearts

bigger than whales

brains of gnats

carbon based...because the closer they are to us the uglier the difference.

We know some of the thousand names of Ugly:

Mooties Ooloi the Tyr the Zid Thrakies Procyons cat-like Whimets Hudathons Romulan the Chtorr who eat their prey alive Imkairan brutal Progenitors birdlike Sprookjes hairless Raliish low slung Enddrese Drakh Ghoster plundering Thrints the Fithp EsKays Catteni Eosi amphibious Hrossa Idomeni Zardalu the Fein Calibi...

Crackly versions of 'Sieg Heil' or 'Banzai'

skitter loud, un-nerving sibilant speech from unmoving lips

(could be lips could be speech only they know; could be farts)

high pitched chatter of mad robot cicadas with broken timing belts.

Superior to us, yes!

Colonizers...with warp drive.

Yes!

They come to conquer.

Sad fact: we're feisty but easily conquered.

Which explains why we're popular.

Happy fact: always one with human envy

christian morals and death wish.