Leaving aside the obvious political humor potential
in your question, you did ask about the densest
THING, not the densest material, on Earth. That
would probably be a neutron. While many subatomic
particles are considered points, and thus could be
thought of as having an infinite density, the
neutron has a measurable size (about 10-15 m in
diameter) as well as mass (about 1.7 x 10-27 kg).
Those numbers result in a density of about 1018 kg/m3.
That value matches the estimated density of neutron stars, the densest objects known in the
Universe. (A black hole's mass is concentrated in an immeasurable singularity). A single
is a smaller (MUCH smaller!) version of a neutron
star, and the Earth is loaded with neutrons.
Answered by: Paul Walorski, B.A. Physics, Part-time Physics Instructor
'In a way science is a key to the gates of heaven, and the same key opens the gates of hell, and we do not have any instructions as to which is which gate.
Shall we throw away the key and never have a way to enter the gates of heaven? Or shall we struggle with the problem of which is the best way to use the key?'