[Zap Brannigan]

The story about the green children found near a cave in Spain in 1887 is a rip-off of an earlier myth called the "Green Children of Woolpit." See,

http://anomalyinfo.com/articles/sa00018.shtml

[eno_]

I'm sure a good many of these anomalies are frauds - "gee, this pot fits the way that coal cleaved pretty well" - and I'm too lazy to dig up whether photos of any of these things exist.

But I do rather doubt that da Vinci was the first man to ponder flying machines, and that stone cities are a technology that does not date back farther than the last ice age.