Could be interesting for some...

[Angel One]

story.news.yahoo.com/news?tmpl=story&u=/ap/20040201/ap_on_sc/new_elements

Especially Cyber, since we were just talking about element 115 a few days ago:

In the artificial environs of the cyclotron, atoms of element 115, now labeled Ununpentium, apparently lasted only a fraction of second before it decayed into element 113. The atoms of element 113, known as Ununtrium, persisted for more than 1 second

element 115, I have read, is supposed to have some kind of property that affects gravity in a way other elements dont, perhaps some kind of "anti-gravity" particle. I read that its used in alien craft for this reason.

[Izkata]

If it decays that quickly, how would it's effects be harnessed?

[Angel One]

Thats the thing. Im not sure, perhaps the aliens have some way of stabilising it? Or it could occur naturally in some places, with differetn environmental properties than here.

[Izkata]

<looks again>

Well, it didn't say it's mass, so maybe different isotopes would be more stable?