Polonium - which is fiercely radioactive. So much so that it actually “jumps” - atoms break of it and migrate around labs, unless the sample are hermetically sealed. (View Post)

In the hazard books - it’s toxic, but the exposure levels for problems are pretty high. Mercury is far worse, IMHO. A lump of uranium can sit on your desk - won’t do anything unless you grind it to d… (View Post)

If Oklo is any indication, it would bubble away gently in the heart of the mountain for millions of years at a low rate. It would probably pulse - the reaction would poison itself with daughter isoto… (View Post)

That’s why the USAF actually calls it Low Observable, not Stealth. LO refers to signature reduction across the electromagnetic spectrum as well as noise reduction. (View Post)

Unless the Iranians have actually constructed a no-point safe nuclear bomb - a nuclear bomb that can yield significantly with a single point of detonation* - there is no possibility of a nuclear expl… (View Post)