2 ms·

I expect this is true, but I'd like to have a whole lot more information than the article contains. Specifically, under what conditions the cracks are observed

by gozur88 10y ago

I expect this is true, but I'd like to have a whole lot more information than the article contains. Specifically, under what conditions the cracks are observed.

JshWright 10y ago
The cracks were observed during ground testing, several years ago.