When did Rock'n'Roll begin?
 

Suggestion:
[URL]http://www.youtube.com/watch?v=PR6pHtiNT_k&feature=related[/URL]
or
[URL]http://www.youtube.com/watch?v=Xf00r-0tHjM&feature=fvw[/URL]
and if you need further convincing:
[URL]http://www.youtube.com/watch?v=zKxj3KbSiYk&feature=related[/URL]

David

This is as answerable as when life begins; it depends on your definition.

:soapbox:

[QUOTE=davieddy;185878]When did Rock'n'Roll begin?[/QUOTE]Hmm, let's see now. Rocks were invented ~13GY ago and they rolled almost at the same time, so I would guess ~13GY ago?

[QUOTE=retina;185891]Hmm, let's see now. Rocks were invented ~13GY ago and they rolled almost at the same time, so I would guess ~13GY ago?[/QUOTE]

Rocks weren't "invented".

[quote=10metreh;185915]Rocks weren't "invented".[/quote]Okay --

Rocks [I]began[/I] several gigayears ago (not 13 GY -- it took time for the earliest supernovae's spew of elements heavier than helium to begin coalescing -- maybe 12 GY ago) and they began rolling shortly thereafter. :smile:

[QUOTE=cheesehead;185922]Okay --

Rocks [I]began[/I] several gigayears ago (not 13 GY -- it took time for the earliest supernovae's spew of elements heavier than helium to begin coalescing -- maybe 12 GY ago) and they began rolling shortly thereafter. :smile:[/QUOTE]So the Q becomes: When were POP II stars first formed? Since presumably the planets (with the rocks) would have also formed around the stars at the same time.

[quote=retina;185923]So the Q becomes: When were POP II stars first formed? Since presumably the planets (with the rocks) would have also formed around the stars at the same time.[/quote]Hey! You were right after all. The oldest POP II stars, such as [URL]http://en.wikipedia.org/wiki/HE0107-5240[/URL] and [URL="http://en.wikipedia.org/wiki/CS22892-052_%28star"]http://en.wikipedia.org/wiki/CS22892-052_(star[/URL]) are estimated to be 13 GY.

I'd forgotten that there are three populations. ([URL]http://en.wikipedia.org/wiki/Metallicity[/URL])

[QUOTE=cheesehead;185926]Hey! You were right after all.[/QUOTE]I think that is the first time ever in my life. Excuse me for a moment while I celebrate.

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Okay, I'm back now, I did a mini Rock'n'Roll celebratory dance.

>When did Rock'n'Roll begin?
I suggest : Birth of Rick Astley.

[quote=retina;185932]I think that is the first time ever in my life. Excuse me for a moment while I celebrate.[/quote]I shall not soon again doubt you.