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Life Signs
A Space Daily column

Life Signs

Nature and earth science

Life Signs is where Space Daily looks down instead of up. Animals, ecosystems, and Earth science, with a bias for peer-reviewed studies over press-release hype. The living world turns out to be at least as strange as anything in orbit.

Climate Science

Around 252 million years ago, volcanoes across what is now Siberia erupted repeatedly for more than a million years, releasing perhaps 100,000 billion tonnes of carbon dioxide and helping wipe out roughly 90 per cent of marine species in the deadliest mass extinction Earth has ever known

The end-Permian extinction was not a single volcano exploding on one bad day. It was a long volcanic province, a changing climate system, and a marine biosphere pushed past several limits at once.

Exo Life

With 30 minutes left in her submersible dive, geochemist Mengran Du steered toward one last stretch of the deep trenches between Russia and Alaska — and found life where almost no one expected it. Published in 2025, the discovery revealed a 2,500-kilometre ecosystem of clams and tubeworms as deep as 9,533 metres, powered not by sunlight but by methane and hydrogen sulfide seeping from the seafloor.

With about 30 minutes left in a submersible dive, geochemist Mengran Du and her crewmates pushed toward one more stretch of the deep trenches between Russia and Alaska.

Early Earth

Gold isn’t rare on Earth — it’s buried 3,000 kilometres too deep to reach. In 2025, scientists found that more than 99.999% of the planet’s precious metals are locked in the core, while Hawaiian lava carries traces suggesting some of that core material is slowly leaking upward.

Geochemists at the University of Göttingen have found chemical evidence that material from Earth's core is mixing into the mantle plume that feeds Hawaii's volcanoes, a boundary long assumed to be effectively sealed.

Africa News

The last missing royal tomb of Ancient Egypt’s Eighteenth Dynasty, belonging to a pharaoh named Thutmose II who ruled approximately 3,500 years ago, was announced by a joint British-Egyptian archaeological team in February 2025, in the first discovery of a pharaonic tomb near the Valley of the Kings since Tutankhamun’s was found by Howard Carter in November 1922.

The Eighteenth Dynasty of Ancient Egypt ruled the country between approximately 1550 and 1292 BCE, a period during which Egypt reached the greatest territorial extent, wealth, and cultural influence in its recorded history.

Clone Age

When a team led by Rozenn Pineau sequenced more than 500 tissue samples from across Pando, the giant Utah aspen clone, they expected the genetics to map cleanly onto geography, and instead found something quietly holding tens of thousands of years of mutation in check across a single 43-hectare body

In Utah's Fishlake National Forest, 47,000 quaking aspen trunks share one root system, weigh roughly 6,000 tons, and belong to a single organism that has been genetically the same individual for at least 9,000 years — and is now being nibbled to death by mule deer.

Climate Science

Singapore has the highest green cover of any major city on Earth at 47 per cent, achieved through a deliberate six-decade urban forestry programme that began in 1967 when the country’s founding Prime Minister decided that trees were essential infrastructure, and the country is now attempting to apply the same approach to food production, with substantially less success than the trees

Singapore is approximately 730 square kilometres in area, smaller than the city of London and substantially smaller than metropolitan New York.