I think it is 400m years, not 400--
The shifting sands along Hawaii's Waianae coast have revealed rock art that could date back more than 400 years, experts say.
cnn.com|By Jareen Imam
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https://www.google.com/search?client=firefox-b-1-d&q=Famous+Chinese+tenors#fpstate=ive&vld=cid:12005ab7,vid:_d4ap5I_tmk,st:0
