Einstein's theory says the speed of light is constant – but what if he was wrong? Researchers say the speed of light might have been much faster in the very early universe. Nov 28, 2016
San Francisco's Millennium Tower is sinking by 4cm every year and no one really knows why Skyscraper at centre of city has been sinking and tilting since it was completed in 2009. Nov 28, 2016
Africa's tallest tree discovered in remote valley of Kilimanjaro Scientists say urgent action is needed to protect region in which the natural wonder is located. Nov 25, 2016 Conservation
Where will the next mega earthquake hit? Curvy faults may be key Scientists say likelihood that fault curvature is linked to megathrust earthquakes is over 99%. Nov 24, 2016
GHB: The dangerous drug Stephen Port used to rape and murder four men Gamma-Hydroxybutyrate is used to treat sleeping disorder narcolepsy but has become a known date-rape drug. Nov 24, 2016
Extremely rare and ancient 'thinking man' jug discovered in Israel Vessel dates to Middle Bronze Age and was found alongside daggers, an axe head and arrowheads. Nov 23, 2016
Bigger penises make female fish evolve bigger brains – so they can avoid males Females appear to evolve increased cognitive ability so they can avoid male mating attempts. Nov 23, 2016
Young blood appears to rejuvenate old mice. But what happens when you give young mice old blood? New method of swapping blood between mice reveals how old blood has massive adverse effect. Nov 22, 2016
An ocean of water exists deep beneath Earth's surface – and if it dries up we're all dead Scientists find the mineral brucite can store and transport water at far greater depths than thought. Nov 21, 2016
Sergio Canavero unveils another milestone in his plan to carry out world's first human head transplant Italian neurosurgeon unveiled the surgical blade and virtual reality system he plans to use for the operation. Nov 21, 2016 Virtual Reality VR
Cryonic freezing: Meet the people who want to be brought back to life in the future Members of Cryonics UK explain why they want to be frozen in the hope of being revived. Nov 18, 2016
Want to live past 90? Women who have children later live longer Having two to four children was also associated with living for longer. Nov 17, 2016 Pregnancy
66 million years after the dinosaur-killing asteroid struck, scientists drilled into its crater – here's what they found... Scientists find out how the peak of the Chicxulub crater in Mexico collapsed. Nov 17, 2016
This is the roundest thing you will ever see Extremely spherical star discovered slowly rotating 5,000 light years from Earth. Nov 17, 2016 NASA
Sea sponge inspires cancer drug without the toxic side effects of chemotherapy Synthetic version of rare compound from Diazona angulata used to treat leukaemia, breast and colon cancer. Nov 16, 2016
Autism may have spurred human evolution through logic and detail-based skills Collaborative morality among hunter-gatherers included people with autism traits, allowing their skills to flourish. Nov 16, 2016
Doctors report rare case of penile strangulation after man puts wedding ring on penis Man admitted to hospital with 'penile strangulation' after putting wedding ring on it for 'erotic reasons'. Nov 16, 2016
Stephen Hawking believes humans will have to leave Earth in next 1,000 years – or go extinct Physicist says mankind would need to move to a new planet in coming millennium if we are to survive. Nov 16, 2016
US experts just halved the maximum screen time recommended for under 5s Child psychiatrist warns children under 2 should not be exposed to any TV or computer screens. Nov 16, 2016
Incredibly well-preserved graves of some of the earliest Christians in the UK unearthed in Norfolk Skeletons were discovered inside tree-trunk and plank-lined coffins near a wooden structure believed to be a church. Nov 16, 2016