Peppermint and peppermint oil are LIKELY SAFE when taken by mouth in amounts commonly found in food, when taken in medicinal amounts, or when applied to the skin. The leaf is POSSIBLY SAFE when taken in amounts used for medicine short-term (up to 8 weeks). The safety of using peppermint leaf long-term is unknown.
Itâs clear that in order to have the current balance of elements that Earth has further up, the core must be 85 percent iron and 10 percent nickel. That has meant that 5 percent of it has remained up for grabs, so to speak, to anyone who can come up with a convincing enough theory.
The inner core, on the other hand, is the solid part that is believed to contain at least 90% iron, which is like a central layer of dense pound cake. The outer core goes from a depth of 2,550 km down to 4,750 km, and the inner core continues to the center of the Earth at a total depth of 6,470 km.