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How safe is the US food supply?

Food in the US has a bad rap thanks to outbreaks caused by bacteria, plus processing, additives and food dyes, but the food supply is actually much less risky...

Changing a single number among billions can destroy an AI model

Today's huge AI models are composed of several billion numbers known as weights and...

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Orcas have begun wearing salmon hats again – and we may soon know why

About 40 years ago, researchers noticed a population of orcas had begun swimming around...

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Forest schools don’t actually boost most children’s mental health

Swapping classrooms for the woods doesn't appear to improve most children's mental health, but...

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The radical treatments bringing people back from the brink of death

Reperfusion technologies that can reanimate human brains are raising the possibility that death could...

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Natural fibres in wet wipes may actually be worse for soil and animals

Fibres in wet wipes and clothes often make their way into soil - and natural versions could be more damaging than synthetic ones

Ancient Mesopotamian clay seals offer clues to the origin of writing

Before Mesopotamian people invented writing, they used cylinder seals to press patterns into wet clay – and some of the symbols used were carried...

Spraying rice with sunscreen particles during heat waves boosts growth

Zinc nanoparticles, a common sunscreen ingredient, can make plants more resilient to climate change – in a surprising way

Heat can flow backwards in a gas so thin its particles never touch

A surprising reversal of our usual understanding of the second law of thermodynamics shows that it may be possible for heat to move in...

The COP16 biodiversity summit was a big flop for protecting nature

Although the COP16 summit in Colombia ended with some important agreements, countries still aren’t moving fast enough to stem biodiversity loss

The complete guide to cooking oils and how they affect your health

From seed oils to olive oil, we now have an overwhelming choice of what to cook with. Here’s how they all stack up, according...

COP29: Clashes over cash are set to dominate the climate conference

The focus is on finance at the UN climate summit in Baku, Azerbaijan, this month, but countries are a long way from any kind...

Bird flu was found in a US pig – does that raise the risk for humans?

A bird flu virus that has been circulating in dairy cattle for months has now been found in a pig in the US for...

We’ve seen particles that are massless only when moving one direction

Inside a hunk of a material called a semimetal, scientists have uncovered signatures of bizarre particles that sometimes move like they have no mass,...

Viruses may help store vast amounts of carbon in soil

Soil is full of an uncountable number of viruses, and scientists are only beginning to understand just how substantial their role in the carbon...

There may be a cosmic speed limit on how fast anything can grow

Alan Turing's theories about computation seem to have a startling consequence, placing hard limits on how fast or slow any physical process in the...

World’s largest tree is also among the oldest living organisms

DNA analysis suggests Pando, a quaking aspen in Utah with thousands of stems connected by their roots, is between 16,000 and 81,000 years old

One in 20 new Wikipedia pages seem to be written with the help of AI

Just under 5 per cent of the Wikipedia pages in English that have been published since ChatGPT's release seem to include AI-written content

Cloud-inspired material can bend light around corners

Light can be directed and steered around bends using a method similar to the way clouds scatter photons, which could lead to advances in...

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