On The Tracks Of The Earth’s Mantle Helium
Source : www.thehindu.com Date : 2018-12-30 OPINION Relevant for: World & Indian Geography Topic: Important Geophysical phenomena – Earthquakes, Tsunamis & Volcanoes Helium – the second most abundant element in the universe – is hard to come by on Earth in its gaseous state, because it is so light that it can escape easily. But one…