There once was a neutrino: Tau lived and loved his name.
A lepton of determination - none would be the same 
He'd morphed, you see, two or three times he could recall....
and learned within his multi-lives, one cannot have it all

"Yet I will find my way through Earth," he found himself now singing
"As from my Father Sol the Sun I come a-bravely winging!"
Overheard by Muon tracking gamely at his side, who said
"I've heard on Earth, with horrid things you're likely to collide!"
"Not me," said Tau, "for I have found that thought overrides matter
and I will fight my way through life where other forms may scatter!"

While Muon foresaw doom ahead he had no eyes to see, so
he hit a bath of Argon hard somewhere in Italy.
Tau ploughed on regardless giving just a little sigh.
"If only all the others could see life and love as I."

The nanoseconds passed, as Tau deliberated fate
cruising unaccompanied through Earth's tectonic plates.
Just as his thoughts were yielding to a greater scheme than "I"
his path was intersected by the brightest meson, Pi.

Pi was most insistent. "You have not learned enough.
My great-great Uncle Pi took Fibonacci by the scruff,
and taught him in a thousand dreams what many dare not mention;
That mathematics lies behind life's every insurrection".
"All very well," said Tau, bemused. "But love is no equation.
And I will not be governed by symmetric limitation".
"Have it your way," sneered Pi, "but you can mark my words.
One day every mind will know what great laws are incurred."

Well, Tau continued through the crust and sensed a change ahead
He thought to oscillate, then thought, "I'll influence instead!
I know that there is more to life than changing with the seasons.
There has to be a purpose here. There has to be a reason."

A child lay in a garden, on softly yielding grass...
her mother wept beside her as the minutes slowly passed...
for her little girl had asked that she be shown the sun again
before Heaven took her little life and took away the pain.

Tau felt the impact suddenly, as a board gives to a dart.
He gave his living energy there in the child's heart.
As he died, he realised that what he'd thought was true;
though he could not pass the truth on, he could only hold the view.
The little girl opened her eyes and whispered, "Hello, Mummy.
Somewhere out there I just know that someone died for me."

The photons in her body were rejuvenated now.
They took a surge of strength in life thanks to the path of Tau,
and though she'd never know it, she still holds to the vision
that all is for a reason, though it's not a loud admission;

Now she's an astrophysicist, who can hardly be expected
to go round voicing dear beliefs in childhood elected.
Although she thinks, in solitude, the world around is nuts -
While science holds itself apart, so many doors it shuts.

I've just returned from two Cosmology conferences in Durham, where scientific collectives boldly went in search of the parameters for Dark Materials and presented a wide-ranging host of ideas as to what Dark energy and matter might be.