Rap - it's because so far, this is the only planet with chocolate!

I'm a hopeful sceptic.... but I can't help thinking of the final words of the Monty Python song from 'Meaning of Life'

So remember when you're feeling kind of small and insecure,
How incredibly amazing is your birth;
And pray that there's intelligent life, somewhere out in space,
Cos there's bugger all down here on Earth!

LTS