Scientists say they have gained new insight into what lies at the very centre of the Earth. Research from China and the US suggests that the innermost core of our planet has another, distinct region at its centre. 
The team believes that the structure of the iron crystals there is different from those found in the outer part of the inner core.
The findings are reported in the journal Nature Geoscience.
Without being able to drill into the heart of the Earth, its make-up is something of a mystery. So instead, scientists use echoes generated by earthquakes to study the core, by analysing how they change as they travel through the different layers of our planet.
Prof Xiaodong Song, from the University of Illinois at Urbana-Champaign said: “The waves are bouncing back and forth from one side of the Earth to the other side of the Earth.”
Prof Song and his colleagues in China say this data suggests that the Earth’s inner core – a solid region that is about the size of the Moon – is made up of two parts.
The seismic wave data suggests that crystals in the “inner inner core” are aligned in an east-to-west direction – flipped on their side, if you are looking down at our planet from high above the North Pole.
Those in the “outer inner core” are lined up north to south, so vertical if peering down from the same lofty vantage point.



One book that at least addresses part of the problem as it relates to climate, is Essex and McKitrick’s Taken By Storm, in the chapter titled, “Climate Theory Versus Models and Metaphors”. 
In a groundbreaking study at Pacific Hydro’s Cape Bridgewater windfarm in the state of Victoria, Australia’s leading acoustical engineer Steven Cooper found that a unique infrasound pattern, which he had labelled “Wind Turbine Signature” in previous studies, correlates (through a “trend line”) with the occurrence and severity of symptoms of residents who had complained of often-unbearable “sensations”.







But they’ve been contradicted by a highly authoritative scientific team, one actually set up to try an establish objective facts in this area.