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An intrepid expedition team set off in 2018 to look for a mysterious species of squirrel in the Peruvian Andes. What they found instead was a brand-new species of opossum.  The rest of this article is behind a paywall. Please sign in or subscribe to access the full content. “I realized immediately that this was […]

Interstellar comet 3I/ATLAS is about to vanish from view. Earth and this interstellar interloper will be on opposite sides of the Sun for a little while. The glare of our star will be blocking the object from view in the coming days, until the two celestial bodies appear too close in the sky for the […]

A new take on the origins of Earth’s water claims to reveal the composition of the Earth in the first few million years after it formed. This theory proposes the planet was dry before the collision that formed the Moon, which would make habitable Earth-like planets very much the exception, not the norm. The source […]

Human classification, from celestial bodies to living organisms, often starts with their morphology. Depending on how something looks, it gets a certain label. This is all well and good until you find the exceptions, so you expand the category. But what happens when you find an exception to the exception? Well, you get something like […]

As geopolitical interest in the Arctic heats up, China has just pulled off its first dive under the Arctic ice in a crewed submersible vehicle.  Described as “a leap in deep-sea exploration capabilities,” four Chinese research vessels docked in Shanghai on Friday, September 26, after completing the country’s largest-ever scientific exploration in the Arctic Ocean.  […]

American philosopher John Searle, widely known for his famous “Chinese room” argument produced in 1980, has died aged 93, per philosophy news website Daily Nous. As natural language models and artificial intelligence (AI) chatbots improve, AI is becoming more successful at convincing us that it is human. But this doesn’t mean that it is conscious, […]

Geomagnetic disturbances caused by solar activity could be increasing the risk of heart attacks here on Earth, according to a recent study that forms part of a growing body of evidence on the topic.  Almost one year ago, NASA announced that the Sun had officially reached solar maximum, the high point of activity in its […]

Think you’re a pro at doing your laundry? It could be time to think again. Turns out, washing at cooler temperatures may be the way to go – for the benefit of the planet, your clothes, and your bank balance. Once upon a time, warmer may have been better, but washing machines have changed, as […]

Imagine you find yourself walking through a forest during the fall, collecting conkers and admiring the crunchy, vividly colored leaves, when the scent of delicious baked goods hits you. You search far and low for the source, only for no bakery to be found. Where is the smell coming from? It may well be the […]

Issue 39 (October 2025) of CURIOUS is out now, bringing you science highlights for the month plus deep dives into intriguing topics, interviews, exclusives, diary dates, and explanations for some of Earth’s most perplexing natural phenomena and landscapes. The rest of this article is behind a paywall. Please sign in or subscribe to access the […]

Blue Babe bison lived twice. First, 50,000 years ago, the steppe bison (Bison priscus) wandered Ice Age Alaska until a lion brought it down. Its second life began millennia later, when scientists uncovered its perfectly preserved body from the Alaskan permafrost, where it had lain frozen since that ancient day. The rest of this article […]

The world’s oldest lake lies in southeastern Siberia and is thought to have existed for about 25 million years. Along with being the great-great-grandfather of lakes, Baikal is also the deepest, plunging 1,700 meters (5,600 feet). That remarkable depth holds roughly 20 percent of the planet’s unfrozen freshwater, and in a body of water that […]

This week, some saucy leopard sharks have been caught having a “threesome” in a world-first sighting, NASA has proposed blowing up an asteroid to prevent it from hitting the Moon, and fossils of hybrid mammoths suggest interbreeding was happening for thousands of years. Finally, we ask: why are humans so smart, and how did our […]

What’s the biggest river in the world? No, it’s not the Amazon, nor the Nile – it’s an atmospheric river, flowing a few kilometers above your head. That’s not a joke. Atmospheric rivers are typically thousands of kilometers long and hundreds wide, and they contain, on average, twice the amount of water as the Amazon. […]

Ketogenic diets, usually shortened to keto, are promoted as a way of losing weight and improving your general health, but the long-term impacts of following such a diet are still being unraveled. A new study throws some concerning findings into the mix, suggesting that while the diet may be effective for weight loss, it could […]

When 3I/ATLAS was first spotted a few months ago, it seemed to emit a reddish color. But earlier this month, some astronomers noted it was glowing green. So why is our latest interstellar visitor appearing to switch colors like a traffic light? The answer isn’t certain, but it has something to do with cosmic chemistry. […]

In January 2019, a beached whale in Florida started a chain reaction that led to the discovery of a brand new whale species. Originally thought to be a slightly funky population of Bryde’s whale, the newly minted Rice’s whale became Earth’s newest whale species. There’s only one problem: there are just 50 of these individuals […]

It’s a good time to see Saturn in terms of closeness to Earth and height in the sky, but if you take a look through a small telescope you might get a shock. The rings will be barely visible. Although they will gradually return to view, it’s likely that what you are seeing is a […]

Roughly the size of a small human, the Chinese giant salamander is one of the largest amphibians in the world. These blob-like beasts are sometimes called “living fossils” as they belong to a lineage stretching back 170 million years. In recent decades, however, a new phenomenon has emerged in their strange and twisting tale: hybrids.  […]

Somehow, for reasons that are still unclear, the natural world gave rise to tiny mushrooms teeming with the psychoactive compound psilocybin. Even more astonishingly, the ability to produce this particular psychedelic didn’t evolve just once – it emerged at least twice independently. Psilocybin is a naturally occurring psychedelic substance that profoundly alters consciousness and perception. […]