The name “core” suggests something hard and fixed but, it turns out, the Earth’s core is leaking. That is, at least, according to a team of top scientists, who drew the conclusion after analysing 62-million-old Arctic rocks. Geochemists from the California Institute of Technology and Woods Hole Oceanographic Institution detected record concentrations of helium 3 (3He) and helium 4 (4He) isotopes in the rocks, which suggest a slow trickle up from the very heart of our planet. They believe there could be reserves of the elusive gas buried some 2,900km underground. Helium is a surprisingly rare element on the Earth’s surface and experts have yet to establish just how much of it remains trapped deep beneath our feet. However, the new discovery has provided them with a fresh insight into the most mysterious region of our world. Understanding the presence of these helium isotopes could illuminate key processes in the core, such as how the Earth generated its life-protecting magnetic field. Most helium in the universe dates back to the Big Bang which occurred 13.8 billion years ago. The Earth swallowed up some of this as an infant planet, but mostly burped it all away during its 4.6 billion-year-long formation, as Science Alert reports. This means that any traces of helium found in volcanic rock – such as the samples unearthed in the Arctic – are believed to come either from pockets of mantle that are yet to release their helium, or from a vast, slow-leaking reserve. Basaltic lavas on Canada's Baffin Island contain some of the world's highest ratios of 3He to 4He, which geologists believe indicates that the gas's presence is not to do with the atmosphere, but rather the sign of deeper terrestrial origins. Several years ago, geochemist Forrest Horton uncovered helium isotope ratios of up to 50 times that of atmospheric levels in samples collected from Baffin's lava fields. This unusual concentration was also detected in lavas collected from Iceland. Horton and his team wondered if the helium in both samples may have derived from an ancient reservoir deep within the crust. And, it seems, their hunch may have been right. Their latest analysis – including specimens of the mineral olivine taken from dozens of sites across Baffin and surrounding islands – has delivered the highest ratio of 3He to 4He ever recorded in volcanic rock – measuring nearly 70 times anything previously detected in the atmosphere, as Science Alert notes. The team also considered ratios of other isotopes in order to rule out factors that may have altered the helium’s composition post-volcanic eruption, and found that the ratio of isotopes in the gas neon also matched the conditions present during the Earth’s formation. Despite advances in geology, the Earth’s core remains a great mystery, given that we have no way of directly exploring its core. The deepest hole humans have ever dug – branded the "entrance to hell" – extended an impressive 12,263m (40,230ft) down, but even that doesn’t come close to breaking through the crust to the layers beneath. Still, thanks to techniques like seismic tomography – which analyses how waves of energy travel through different materials during earthquakes – we’ve been able to map out the world’s interior. And carefully crafted simulations, based on the thermodynamics and pressures of our planet’s innards, suggest reserves of noble gases (like helium and neon) trapped in the core could have been protected as the Earth grew before seeping into the surrounding mantle over time. If the core is leaking, this could teach us a thing or two about how planets like ours form and how life, eventually, emerges. Sign up for our free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings

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DURHAM, N.C.--(BUSINESS WIRE)--May 23, 2023--

For decades, archaeologists have been trying to work out how a trove of ancient Egyptian artefacts were buried in the grounds of a school in Scotland. In 1952, a schoolboy was sent to dig up potatoes as a punishment – how times have changed – when he found a statue. It turned out to be a masterpiece made some 4,000 years ago. Fourteen years later, more treasure was discovered by a boy during a PE class, before, in 1984, a group found another item with a metal detector. It turned out to be part of a set of 18 antiquities dug up over the next 30 years at Melville House, a historic building in Fife, Scotland. But nobody had any idea how they got there. Now, researchers think they might have unearthed what was going on. Alexander Lesie-Melville was a young heir to Melville House when he travelled to Egypt in 1856. A year later, he had returned to Scotland and died. Leslie-Melville might have picked up the collection on his travels – it certainly beats the Duty Free section at Heathrow – as antique dealers routinely sold ancient artefacts to rich foreigners during that period. After Leslie-Melville died, family members are thought to have moved the objects to an outbuilding, where they were promptly forgotten about. The outbuilding was then demolished. Margaret Maitland, principal curator of the Ancient Mediterranean at National Museums Scotland where most of the objects are housed, said: “The discovery of ancient Egyptian artifacts that had been buried in Scotland for over a hundred years is evidence of the scale of 19th century antiquities collecting and its complex history.” “It was an exciting challenge to research and identify such a diverse range of artefacts.” Dr Elizabeth Goring, who has since investigated the site, said: “Excavating and researching these finds at Melville House has been the most unusual project in my archaeological career, and I’m delighted to now be telling the story in full." The full story will be published in an upcoming article in the journal Proceedings of the Society of Antiquaries of Scotland. How to join the indy100's free WhatsApp channel Sign up to our free indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

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