How the tiger got his stripes: Can a mathematical equation answer that question?
Why are stripes in nature orientated in a certain direction?
Exercising in childhood leads to a healthier brain and better metabolism in adulthood
Exercise in early life causes changes to gut microbes that promote healthier brain and metabolism.
Blocking fat transportation increases longevity in worms by 40%
Natural protein that transports fats around the body hinders cell function to increase lifespan.
Endangered Tasmanian devils threatened by second type of transmissible cancer
Transmissible cancers may not be as extremely rare as once believed, study of creatures suggests.
Watch 60 years of space debris accumulating around the globe in 60 seconds
Earth is now surrounded by space debris – watch the story of how this happened.
Ancient Irish genomes show mass migration to Emerald Isle from Middle East and Europe
First genomes of ancient Irish humans shows origin of 'Celtic disease' and blue eyes.
Holograms, wormholes & parallel worlds: Best theories about the universe in 2015
What theoretical physicists said about parallel worlds and the universe over the last 12 months.
Yellowstone supervolcano: Facts we learned about the active volcano in 2015
Yellowstone volcano has a massive magma reservoir we didn't know about.
Rare disease: Teenager infected with rat-bite fever from pet rodent living in bedroom
Seventeen-year-old girl tested positive for Streptobacillus moniliformis, most common cause of rat-bite fever.
Tyrannosaurus bataar: Nicolas Cage returns rare stolen dinosaur skull to Mongolia
Hollywood star bought the stolen skull in 2007 for $276,000.
Israel: Mysterious gold object weighing 8.5kg discovered in Jerusalem cemetery
Israel Antiquities Authority seeking help to identify strange gold object found in an old building.
Volcano spectacular: Watch some of the biggest eruptions of 2015 from across the globe
Video footage of some of the biggest volcanic eruptions of the year.
Teotihuacans kept pumas in captivity and fed them human sacrifices as part of ancient rituals
Teotihuacan people kept wolves, eagles and pumas in captivity 1,000 years earlier than previously thought.
Zolpidem: Sleeping drug found to significantly increase stroke recovery in mice
Ambien increases recovery time in mice following stroke – but human studies still a way off.
Super condom offers HIV protection and enhanced pleasure through hydrogel and antioxidants
Super condom will be available to buy next year following Bill & Melinda Gates Foundation funding.
Cradle of the Scythians: Graves of 100 nomads buried 2,500 years ago excavated in Russia's North Altai
Archaeologists find Necropolis of over 100 single-skeletal graves containing ancient Scythian nomads.
Darwin's finches face extinction within decades because of parasitic flies on Galapagos Islands
Model shows pest-control could save Darwin's finches from extinction.
Red Deer Cave people: Bone discovery suggests ancient human species survived until last Ice Age
Controversial study shows 14,000-year-old bone has features resembling the most ancient Homo species.
2003 SD220: Asteroid to flyby Earth on Christmas Eve in first of five encounters
Flyby will be from a safe distance of 6.7 million miles away from Earth.
Pinder? Endangered giant pandas prefer breeding with mates they fancy
Getting giant pandas to mate is notoriously difficult – so giving them a choice of partners is the way forward.
Vladimir Putin's funny walk 'the result of Russia's KGB training' not Parkinson's or stroke
Analysis of well-known Russian officials' walking style points to some sort of weaponry training.
Dogs' sloppy drinking method actually maximises water lapped up
Dogs plunge their tongues into water then retract them so a column of water raises into their mouths.
COP21: Historic climate change deal reached as nations back Paris agreement
Nations across the world have agreed to prevent global warming from rising above 2C threshold.
Time moves forward even in a quantum world, physicists confirm
Experiment confirms thermodynamic processes are irreversible, even in a quantum system.
Roman genocide: Battlefield where Julius Caesar slaughtered 150,000 tribespeople discovered in Netherlands
Archaeologists find location of historic Roman battle where 150,000 people were slaughtered.
COP21: 31-page 'fair and balanced' draft agreement released at UN Paris climate change summit
Final draft agreement at COP21 climate change summit released as global deal edges closer.
Stellarator: Wendelstein 7-X fusion device tested in another step towards cheap, limitless energy
Max Planck researchers make a breakthrough in creating virtually unlimited and clean nuclear power.
COP21 Paris climate deal: Laurent Fabius announces draft agreement to limit global warming to 2C
Nations reach deal to limit emissions and keep global warming below 2C.
Hawaii: 74 new species of round-waisted beetle discovered living on Haleakalā volcano
Dozens of new beetle species discovered on Maui Island volcano show speedy evolution.
Doctify: The healthcare review service looking to transform the patient experience in a digital age
'TripAdvisor' for doctors is looking to put doctor/patient relationship at the forefront of medicine.
