Hannah Osborne is the planet Earth and animals editor at Live Science. Prior to Live Science, she worked for several years at Newsweek as the science editor. Before this she was science editor at International Business Times U.K. Hannah holds a master's in journalism from Goldsmith's, University of London.
Hundreds of millions of years ago, Earth plunged into a deep-freeze that turned the planet into a giant ball of ice. Now, scientists have discovered rocks marking this moment on a remote archipelago in the Inner Hebrides of Scotland.
"Most areas of the world are missing this remarkable transition because the ancient glaciers scraped and eroded away the rocks underneath, but in Scotland by some miracle the transition can be seen," study first author Elias Rugen, a researcher at University College London's Earth Sciences department, said in a statement.
The researchers collected rock samples from two formations on the Garvellachs and analyzed tiny crystals called zircons. Zircons contain uranium, a radioactive element that slowly and steadily decays into lead, so the team was able to determine exactly when the rocks were formed. The researchers found that the lower section of rock formed in tropical waters, when Earth was much warmer.
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