sarahs mum said:

Spiny Norman said:

Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.

The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater

Percentage (%) of the population in which the frequency of cancer is measured on each continent in children (age 0-14 years) and adolescents (age 15-19 years)

This confuses me.