6
$\begingroup$

I am cool without the 12,
I am 688,
in fact, I'm ageless,
I existed when dinosaurs breathed.

If you're stuck,
close your eyes and take a deep breath.
There goes your answer,
gone without being seen.

$\endgroup$
12
$\begingroup$

You are:

Carbon dioxide (CO2)

i am cool without the 12

COOL - L (12th letter) = COO = CO2

i am 688

Atomic numbers: 6=C, 8=O giving COO again

in fact i'm ageless,
I exists when dinosaur breaths.

Carbon dioxide has been exhaled by creatures into the atmosphere since the age of dinosaurs

take a deep breath.
There's goes your answer,
gone without being seen.

It's invisible when you breathe out.

fizzzzzz!

The fizz in soft drinks is carbon dioxide

$\endgroup$
  • $\begingroup$ Ahh you beat me by 21 seconds, good work $\endgroup$ – rlord3534 Apr 28 '16 at 20:11
  • $\begingroup$ Darn, beat me to the punch, nice job! $\endgroup$ – Gordon Allocman Apr 28 '16 at 20:11
  • $\begingroup$ Darn x2, I guess it's too easy! Good work! $\endgroup$ – Alex Apr 28 '16 at 20:22

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