Armour was unearthed in fragments from tomb in Qinghai province

It poses a significant threat to two species facing extinction by the end of the century, a new study reveals

Researchers emphasise need to separate problematic masculinity from constructive forms of masculinity

For three weeks, I wore stickers on my skin supposed to address all sorts of conditions. Are they a panacea, problem or performance?

This morning, I woke up feeling a little groggy. My go-to remedy is usually a coffee and cold-water face plunge, followed by a compulsive phone scroll. But today called for something more, so I unpeeled a small, yellow “energy” patch the size of a walnut, popped it on to my upper arm and hoped for the best.

The patch (£12 for 30) contains – so the packaging says – vitamins B5, B3 and a “microdose” of caffeine. It is made by Kind Patches, which is one brand in an increasingly crowded market of wellness stickers that claim to treat everything from lack of sleep to period pains to pimples. They are coin-sized, and often come in TikTok-friendly shades of sunflower yellow and peachy orange: you may have seen a teenager sporting a star-shaped one on their face to treat spots, or influencers patting blue magnesium ones on their wrists before bed.

Major disturbance in the Earth’s magnetic field may make northern lights visible far more south than usual

The aurora could be visible across Canada and much of the northern tier of US states on Monday night, and possibly even further south, following a major disturbance in the Earth’s magnetic field, a forecast shows.

The forecast, from the National Oceanic and Atmospheric Administration’s space weather prediction center, comes amid intense geomagnetic and solar radiation storms, said Shawn Dahl, service coordinator at the center.

This type of behaviour has previously been demonstrated convincingly only in chimpanzees, researchers say

The answers to today’s puzzles

Earlier today, I set you these three geometrical puzzles. Here they are again with solutions.

1. Bonnie Tiler

People picturing positive experiences found to produce more antibodies, hinting at future clinical potential

Positive thoughts may boost the immune system according to research that points to a connection between the mind and our body’s natural defences.

Scientists have found people who used positive thinking to boost activity in the brain’s reward system responded better to vaccination, with their immune systems producing more antibodies than others after having the shot.

Brown Swiss in Austria has been discovered using tools in different ways – something only ever seen in humans and chimpanzees

Scientists have been forced to rethink the intelligence of cattle after an Austrian cow named Veronika displayed an impressive – and until now undocumented – knack for tool use.

Witgar Wiegele, an organic farmer and baker from a small town in Carinthia near the Italian border, keeps Veronika as a pet and noticed that she occasionally played with sticks and used them to scratch her body.