[paul.fr]

Aside from me, what material or "thing" on earth, has the greatest density?

[syhprum]

Osmium is the densest but you won't meet it often, gold runs it a close second

[lightarrow]

Aside from me, what material or "thing" on earth, has the greatest density?

So you are in good shape, since fat has a lower density than muscles and bones  []

[Bored chemist]

Iridium runs it a much closer second and platinum doesn't do badly.
Gold runs it a close second second in the very important sense of being about eighth in line.
http://environmentalchemistry.com/yogi/periodic/density.html

[syhprum]

I quoted gold as being a common substance that most people have access to.

[DoctorBeaver]

I thought uranium was denser than gold  []

[syhprum]

No uranium is slightly less dense than Gold, I chose gold as most of us have access to a Gold ring and can weigh it in our hand and compare it with a brass or aluminium one and really feel the difference.

[DoctorBeaver]

OK, thanks. My mistake.