Did you know that egg shells can survive a 12 hour kiln firing session with temperatures tipping over 2230 degrees Fahrenheit (approx 1220 degrees Celsius)?!?! Well, I definitely didn't expect that one 
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I had dipped an egg shell in porcelain thinking I would just have a very thin egg-shaped porcelain piece after the kiln firing. Instead, there are actual eggshell remnants which is absolutely amazing!
@SylvieAlvarezArt
That's because the insides of chickens typically run about 2k° F. It's from when we were dinosaurs.
@Mcdyer That's a good one. You actually had me looking up the internal temperature of a chicken. 
