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 Earth's outer core is most likely made up of an iron-nickel alloy while the inner core mostly iron and a bit of nickel and cobalt. This is due to inferences that iron, cobalt and nickel are denser than other materials found at different levels in the structure of Earth, such as magnesium in the mantle.