New Evidence For Seas of Liquid Diamond On NeptuneS  Remote gas
giant planets Neptune and Uranus could be covered in vast seas
of liquid diamond, dotted with solid diamond chunks like
icebergs. A new experiment revealed such oceans are plausible,
and would explain some oddities about Neptune's magnetic field.
Published recently in Nature Physics, the study is an effort to
explain two things: What causes the magnetic poles of Neptune
and Uranus to be so far off their geographic poles; and what
would cause the planets to have a 10 percent carbon makeup.
Diamond seas are the answer, and their experiment suggested that
these seas would behave a lot like water oceans.  New Evidence
For Seas of Liquid Diamond On NeptuneS  Scientists have produced
liquid diamond before (you can see a picture of the "z machine"
above, which liquifies diamond using electricity and pressure),
but mostly for industrial applications. The researchers in this
study, however, wondered what would happen to diamond in an
ultra-hot, high-pres