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Women using frozen embryos as part of their IVF treatment can either choose to use a medicated cycle or their natural one to prepare their uterus for a pregnancy. Now, scientists have found that the latter option seems to carry fewer risks

Extraordinary fossils of 518-million-year-old jawless fish, among the earliest known vertebrates, appear to show that these animals had two pairs of eyes

Newly discovered rock art sites in Sulawesi, Indonesia, that date to nearly 68,000 years ago are thought to be the oldest rock art in the world, pre-dating Neanderthal hand stencils in Spain by 1100 years

A fossil discovery in northern Ethiopia expands the known range of Paranthropus, a genus of strong-jawed hominins that lived around 2 million years ago, and suggests they lived in a range of habitats

The light-sensitive tissue of birds’ eyes is not supplied with oxygen by blood vessels – instead, it powers itself with a flood of sugar, and this may have evolutionary benefits

This follow-up to the influential 28 Days Later continues to take the zombie movie franchise in a surprising and thought-provoking direction

A popular idea suggests a link between big brains and a rich social life, but octopuses don't fit the pattern, which suggests something else is going on

Humpback whales off the west coast of Canada have learned a cooperative hunting technique from whales migrating into the area, and this cultural knowledge may help the population cope as food becomes scarce

People who combine different types of exercise - such as running, cycling and swimming - seem to live longer than those with less varied workouts

Startling findings in 2024 suggested that metallic nodules on the sea floor produce oxygen and might support life. Now researchers are planning an expedition to learn more and refute criticism from mining companies

Countries have spent beyond their sustainable water budgets for so long that critical assets are depleted and the world faces huge economic, social and environmental costs

An electrical outage at Chernobyl nuclear power plant risks dangerous fuel overheating, but experts say that the chances are extremely slim due to the age of the reactors, which were shut down over two decades ago

Two or more satellites could communicate and manoeuvre around one another using magnetic fields, although getting the technique to work at scale in space might be tricky

It is impossible to get rid of anxiety because it exists to help us, says cognitive psychotherapist Owen O'Kane. Instead, he suggests three ways to reframe your relationship with anxiety in order to take back control

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago

Concerns around common sunscreen chemicals have prompted the search for natural alternatives, with lignin from wood being one of the most promising candidates

The strange principle of quantum entanglement baffled Albert Einstein. Yet finally putting quantum weirdness to the ultimate test, and embracing the results, turned out to be a revolutionary idea

A pet cow has learned to scratch herself with a broom, showing creative problem-solving skills that make it harder to ignore the fact that these animals have minds, says Marta Halina

Time and time again, scientists have found that one diet beats all others when it comes to our health. Fortunately, it's delicious – and also good for the planet

The “enormous revelation” that drugs can be used to prevent catching HIV has benefitted millions and helped slash transmission rates