Water filters made from untreated wood can remove more than 99 per cent of particles, taking out many harmful bacteria and microplastics

The report of possible biosignatures on the exoplanet K2-18b is exciting, but we are a long way from establishing beyond doubt that there is life on such a distant world

When Roman Egypt came under attack from the Kushites in what is now Sudan, the Roman forces responded by destroying a Kushite city – or so we thought

New global rules will see a carbon levy applied to emissions from shipping for the first time, but analysts say the package falls short of what is needed

Two independent research teams have developed methods for hacking noisy quantum computers based on a row-hammer attack, a type of interference used to infiltrate traditional computers

Colossal Biosciences’s "de-extinction" news is just the latest in a slew of eyebrow-raising claims by privately funded researchers. Is the bar for belief lower when those making the claims have a lot of money, wonders Jonathan R. Goodman

The 2000-year-old Antikythera mechanism may have been a kind of astronomical calculator, but researchers are unsure whether it would have worked without jamming

The idea of varying your lifestyle throughout your menstrual cycle to help relieve PMS or period pain seems intuitive, but the evidence reveals a nuanced picture, finds columnist Alexandra Thompson

On a faraway planet, the James Webb Space Telescope has picked up signs of molecules that, on Earth, are produced only by living organisms – but researchers say we must interpret the results cautiously

It is harder for our bodies to absorb key nutrients from plant-based foods, so some vegans may be short on essential amino acids for healthy muscles and bones despite eating plenty of protein

Beginning around 3000 years ago, Tel Shiqmona in modern-day Israel was a major centre for the production of Tyrian purple, a valuable commodity produced from marine snails

A weakening of Earth’s magnetic field known as the Laschamps event would have increased the threat of solar radiation, perhaps requiring ancient humans to invent protective measures

It is rare to find brown dwarf stars orbiting in pairs, and this pair has an even more unusual exoplanet companion

Space agencies from the US, Europe and Japan are all making plans to visit the asteroid Apophis when it makes an extremely close flyby in 2029 to learn how to deflect others like it

From timetable scheduling to colouring in, and even casting a play, this nifty piece of mathematics is the answer, says Katie Steckles

Black Mirror's new season is a mixed bag, ranging from a sublimely plotted romp to one of the worst episodes to date. And it's still playing fast and loose with its sci-fi concepts, finds Bethan Ackerley

Photographer Mitch Epstein's years-long project highlights the majesty and vulnerability of old growth forests across the US

Why is saying no to other people so difficult – even when we really know we should? Sunita Sah's new book Defy has some novel ideas about the interpersonal forces holding us back

General relativity is an astonishingly beautiful theory, and grappling with why it disagrees with quantum mechanics is a joy, says Chanda Prescod-Weinstein

Feedback was pleased to come across journalist Taylor Lorenz's coining of the word "viralflation", as videos with hundreds of millions of hits proliferate across the internet