Demonology 101 update. (Phoenix A/Gryphon C)

[llearch n'n'daCorna]

No matter how much explosive you use, I don't think that you could get criticality using unenriched or depleted uranium.

Actually, there's a naturally occurring reactor core in Australia somewhere. Or, at least, the remains of one from a couple million years back.

Sadly I don't have a link to info on it. Shouldn't be too hard to google it up, though...

[Naldru]

No matter how much explosive you use, I don't think that you could get criticality using unenriched or depleted uranium.

Actually, there's a naturally occurring reactor core in Australia somewhere. Or, at least, the remains of one from a couple million years back.

Sadly I don't have a link to info on it. Shouldn't be too hard to google it up, though...

There was one in Oklo in Africa.  There may have been one in Australia, but I don't remember coming across it in the literature.