[–] i_scream_trucks 0 points 2 points (+2|-0) ago 

panspermia is a very valid theory

Methane/Ethane/Nitrogen + Ultraviolet light = Organic Tholins.

Tholins + millions of years equals.... ???

Not saying im right but there are tons of possibilities.

And remember, UFO doesnt necessarily mean 'Intelligent aliens flying around' - it literally means 'Unidentified'

[–] prairie 0 points 0 points (+0|-0) ago 

Exactly, the dinosaures could have simply not been able to identify the flying object as their own craft.

[–] Thyhorrorcosmic103 0 points 0 points (+0|-0) ago  (edited ago)

[–] SeanBox [S] 1 points -1 points (+0|-1) ago 

That doesn't suggest anything. It's just a bunch of squiggly lines.

[–] satisfyinghump 2 points -1 points (+1|-2) ago 

There are no asteroids

[–] Thetiedyeguy 0 points 0 points (+0|-0) ago 

Ive seen meteor showers and a commet though.