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Dog bone fragment dating back 10,150 years is discovered in Alaska

Dog bone fragment dating back 10,150 years is discovered in Alaska Joe Pinkstone For Mailonline © Provided by Daily Mail MailOnline logo The oldest dog remains ever found in the Americas are 10,150 years old and prove canines were with humans when the land was first colonised 6,000 years before. Analysis of a chunk of dog femur, which was found in southern Alaska, reveals the animal was a descendant of Siberian dogs. Scientists believe these ancient dogs accompanied the first humans to the Americas at the end of the last Ice Age when glaciers were in retreat. The finding backs up the theory that people migrated into what is today Alaska from eastern Russia by following a route along the coast as the Bering Strait thawed.

United statesBering straitRoyal societyArkhangel skaya oblastCharlotte lindqvistSilva coelhoFlavio coelhoUniversity of sienaProceedings of the royal societyb readUniversity at buffalo phUniversity at buffaloDaily mail mailonlineIce ageDaily mail analysisNorth americaSoutheast alaska

Brain cells most vulnerable to Alzheimer s identified for first time

Brain cells most vulnerable to Alzheimer s identified for first time Shivali Best For Mailonline © Provided by Daily Mail MailOnline logo Scientists have identified the brain cells that are most vulnerable to Alzheimer s disease for the first time, in what s being referred to as the holy grail of dementia studies. The brain cells lie in a region known as the entorhinal cortex, which controls memory, navigation and time perception, and are the first to be killed off by the disease. The researchers hope the findings could be used to develop a new and much more targeted approach to developing therapies to slow or prevent the spread of Alzheimer s disease.

United statesSan franciscoLea grinbergKatya vladimirovKun lengMartin kampmannAlzheimer research united kingdomCalifornia universityInstitute for neurodegenerative diseasesWorld health organisationDaily mail mailonlineDaily mail theResearch united kingdomProfessor martin kampmannNeurodegenerative diseasesNature neuroscience

First lockdown led to spike in unhealthy diets and alcohol consumption

The study by the University of East Anglia suggests that young people, women and those who are overweight were most likely to adopt unhealthy behaviours.

United kingdomCaitlin notleyFelix naughtonUniversity of east angliaUniversity of surreySchool of health sciencesBritish journal of health psychology readNorwich medical schoolDaily mail mailonlineEast angliaDaily mail peopleDaily mail analysisHealth sciencesMedical schoolBritish journalHealth psychology read

Meat-free diets could be down to genetic mutation, scientists suggest

Meat-free diets could be down to genetic mutation, scientists suggest Jonathan Leake For The Mail On Sunday © Provided by Daily Mail MailOnline logo Scientists have found that opting for a meat-free diet could be down to a genetic mutation rather than a simple lifestyle choice. Analysis of the genomes of British vegetarians found a link between their rejection of meat and mutations in their DNA that distinguish them from carnivores. Researchers compared the genomes of 5,642 British vegetarians with those of more than 360,000 meat eaters. They discovered a single mutation, near a gene labelled VRK2, was strongly associated with people wanting to turn vegetarian.

United kingdomThandie newtonRobbie lockeBenedict cumberbatchEllie gouldingVegan societyWellcome open researchFood standards agencyOxford universityDaily mail mailonlineDaily mail analysisGeorgina fensomNuffield departmentPopulations healthFood standardsPlant based news

NASA lander determines Mars crust resembles a three-layer cake

NASA lander determines Mars crust resembles a three-layer cake Dan Avery For Dailymail.com © Provided by Daily Mail MailOnline logo Data beamed back to Earth from NASA s InSight lander suggests Mars crust is composed of three cake-like layers. Anchored near Mars equator, the robotic lander s super-sensitive seismometer, known as SEIS, has recorded hundreds of marsquakes in the past two years. Each quake emits two sets of seismic waves and analyzing the differences in how those waves move has allowed researchers to begin calculating the size and composition of the planet s crust, mantle and core. We have enough data to start answering some of these big questions, Jet Propulsion Laboratory scientist Bruce Banerdt told Nature.

Bruce banerdtPropulsion laboratoryCentre nationalDaily mail mailonlineJet propulsion laboratoryDaily mail analysisDaily mail insightInterior explorationSeismic investigationsHeat transportMark panningப்ரொபல்ஶந் ஆய்வகம்மையம் தேசியஜெட் ப்ரொபல்ஶந் ஆய்வகம்தினசரி அஞ்சல் பகுப்பாய்வுதினசரி அஞ்சல் நுண்ணறிவு

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