Some trekkers from East Africa all heard a drumming sound.
They followed where the rhythm led and this is what they found,
Some dancing girls, all kind of strange, they were Neanderthal,
But the trekkers bid their doubts farewell
When the barkeep yelled, “Last call!”

The Africans went trekking sixty thousand years ago,
To Europe, Asia, north and south, New Guinea still to go.
They aimed to see the whole wide world but, as our genes recall,
Some guys and gals felt doubts dispel
When the barkeep yelled, “Last call!”

The girls all get prettier at closing time.
Those low foreheads and bushy brows, receding chins and smell,
Don’t count for much when it gets close to closing time,
When grandpa first met grandma and they both said, “What the hell.”

Neanderthals are all long gone but, as our planet whirled,
Progenitors of modern man went on to fill the world.
And, one night in the Middle East…gene sequences tell all,
The trekkers felt some organs swell
When the barkeep yelled, “Last call!”

The girls all get prettier at closing time.
Those low foreheads and bushy brows, receding chins and smell,
Don’t count for much when it gets close to closing time,
When grandpa first met grandma and they both said, “What the hell.”

Coda:
When grandpa first met grandma and they both said, “Might as well.”

See: Science 334, 7 October 2011, pp 89-94