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6 articles from Guardian Unlimited Science

Early human ancestors one million years older than earlier thought

Fossils from South African cave are 3.4 to 3.6m years old and walked the Earth at same time as east African relativesThe fossils of our earliest ancestors found in South Africa are a million years older than previously thought, meaning they walked the Earth around the same time as their east African relatives like the famous “Lucy”, according to new research.The Sterkfontein caves at the...

Are pockets of Covid in the gut causing long-term symptoms?

Scientists are investigating whether reservoirs of virus ‘hiding’ in the body are contributing to long CovidSince the early days of the pandemic it has been clear some people shed genetic material from the virus in their stools for months after catching Covid-19. The findings were initially regarded as a curiosity, but there is mounting evidence to support the idea that persistent pockets of...

Climate change role clear in many extreme events but social factors also key, study finds

Professor says link to extreme weather sometimes overestimated but climate costs underestimatedClimate change is to blame for the majority of the heatwaves being recorded around the planet but the relation to other extreme events impacts on society is less clear, according to a study.“I think on the one hand we overestimate climate change because it’s now quite common that every time an...

Do we need a new theory of evolution?

A new wave of scientists argues that mainstream evolutionary theory needs an urgent overhaul. Their opponents have dismissed them as misguided careerists – and the conflict may determine the future of biologyStrange as it sounds, scientists still do not know the answers to some of the most basic questions about how life on Earth evolved. Take eyes, for instance. Where do they come from, exactly?...

Shitcoins: are pointless cryptocurrencies a scam or a gamble? - podcast

When the Guardian’s UK technology editor Alex Hern was contacted on Twitter to ask if he was involved in a new cryptocurrency called Tsuka, he assumed they just wanted him to buy it. He ignored the messages. But soon after Alex realised that, without knowing it, he was already involved. What happened next reveals a lot about the strange world of ‘shitcoins’ – cryptocurrencies with no...