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They suspect this rare element arrived in Antarctica in the form of interstellar dust, and it arrived in the last 20 years.This radioactive element can be produced in certain nuclear processes and in supernovae.Nuclear power plants and nuclear weapons can produce iron-60 but there was no global fallout to justify the excess of iron-60 seen in the sample from Antarctica.
It is not as well publicized as its larger close neighbour Mt Ruapehu, which has erupted briefly several times in the last five years.
However, Mt Ngauruhoe is an imposing, almost perfect cone that rises more than 1,000 metres (3,300 feet) above the surrounding landscape to an elevation of 2,291 m (7,500 feet) above sea level (Figure 3).
With so many options in flavors and colors, these old time favorites are making their way into weddings and parties.
magazine has been continuously published since 1978, we are publishing some of the articles from the archives for historical interest, such as this.
For teaching and sharing purposes, readers are advised to supplement these historic articles with more up-to-date ones suggested in the Related Articles and Further Reading below.