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 core is an iron-rich sphere with a radius of 3486 kilometers (2161 miles). It has a density of nearly 11g/cm3 (the crust and mantle have densitys of 2.7-3) and at its center the density approaches 14g/cm3. Earth's interior is characterized by gradual increases in temperature, pressure, and density.