We R 3

Here we are my friend
A trifid from a distant place
Near the galaxy's end,
Yes, that would be outer space,
Which you no longer need
To guess about or theorize,
Because we're standing right
Here before your eyes,
A gangly tottering trinity
From someplace beyond infinity,
Bringing a message, if you will
Listen for a minute before
Calling the cops, just chill
And hear what we have to say
About your planet, which
Is about to go the way of
Slow toasting, we've been landing
And warning, but to no avail,
It seems you Earthlings are too
Busy, too saturated, doomed to fail...
But WE R 3, and will persist,
Returning on the comet's tail,
To help, to urge, as long as you exist.