Cryptids

[ignoramus]

if we look at all our space movies like alien, avatar, startrek, Prometheus, id4, district 9, etc, they all have one thing in common. All their vehicles are whoppers!
Motherships! why? Because if you're going to travel a long way, you need a lot more than a cut sandwich and a can of coke.
You need stasis bays, sick bays, cargo bays, enough supplies to last the return journey, weapons systems, fuel, propulsion systems (voyager's warp core alone is how many stories tall, 7?)
plus a myriad of other logistical issues which need to be taken care of. My point is if anybody is ever going to come here, we most miss them!
99% of the dodgy photos of ufo's are the small garden variety type and therefore unfeasible to make the journey.
Also, out of curiosity, if life was to evolve on another planet, what is the smallest size planet which can exist and still have enough gravity to support an atmosphere?
Assuming life needs an atmosphere ... you know the little 6 inch alien controlling the human looking robot in MIB11?, or 111?, could they evolve that size AND be intelligent with such a small cranial capacity. This is why I also don't believe in the little Roswell ufo myth? It also suffers from the same issues as stated above.