Analysis of satellite images provides evidence that dozens of Darfur villages have been burned down.

Parkinson’s disease is the world’s second most common neurodegenerative disorder, behind Alzheimer’s disease. While it’s unknown exactly why people develop the condition, according to Parkinson’s UK, experts believe its a combination of genetic and environmental factors that contribute to the damage of nerve cells in the brain. So what are the symptoms of Parkinson’s disease and how can it be treated? Here’s everything you need to know. What is Parkinson’s disease? Parkinson’s disease is a degenerative neurological condition. This means that over time the brain of an individual living with the disease becomes more damaged, the NHS explains. A person living with Parkinson’s disease doesn’t have enough of the chemical dopamine in their brain, the Parkinson’s Foundation states. Dopamine is responsible for transmitting signals between nerve cells in the brain. When an individual experiences a loss of nerve cells in the brain, this causes a reduction in the quantity of dopamine in the brain. What are the symptoms? The main symptoms of Parkinson’s disease include involuntary shaking (otherwise known as tremors), movement that’s slower than usual and stiffness in the muscles, the NHS outlines. Other symptoms may include difficulty balancing, nerve pain, incontinence, insomnia, excessive sweating, depression and anxiety. For more information about the symptoms of Parkinson’s disease, visit the NHS here. How many people does it affect? Around 145,000 people in the UK are affected by Parkinson’s disease, Parkinson’s UK explains. This means that around one in every 350 adults is living with the degenerative condition. According to the NHS, symptoms of Parkinson’s usually develop after the age of 50. However, for every one in 20 people affected by the disease, symptoms may appear when they’re under the age of 40. The Parkinson’s Foundation outlines that men are 1.5 more likely than women to be affected by the condition. High-profile individuals to have been diagnosed with Parkinson’s include former US president George H. W. Bush, Back to the Future star Michael J. Fox and The Chase star Paul Sinha. How can it be treated? While there is no known cure for Parkinson’s disease, symptoms may be controlled through treatment. The most common form of treatment used for the condition is medication, Parkinson’s UK states. “Drug treatments aim to increase the level of dopamine that reaches the brain and stimulate the parts of the brain where dopamine works,” the charity explains. The medication used to treat Parkinson’s disease varies according to each patient. This is because as symptoms of the disorder progress, the drugs used to treat the condition may need to be changed. While drug treatment may help to manage Parkinson’s symptoms, it cannot slow the progression of the disease. The NHS explains that those living with Parkinson’s disease may also undergo physiotherapy, occupational therapy, and, in rare cases, brain surgery to treat the condition. For more information about Parkinson’s disease, visit Parkinson’s UK. Read More What are symptoms of coronavirus – and where has it spread? Latest travel updates as coronavirus continues to spread Can face masks really protect you against coronavirus or flu? The dirty truth about washing your hands Billy Connolly shares health update on Parkinson’s disease: ‘Every day gets stranger’ Tracey Emin says she ‘totally accepted death’ following cancer diagnosis Nicky Hilton calls out critics who made negative comments about nephew Phoenix’s head

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Bots are better and significantly faster than humans at cracking Captcha tests, according to a comprehensive new study that inspected the security system deployed in over 100 popular websites. Automated bots pose a significant threat to the internet because they can masquerade as legitimate human users and perform harmful operations like scraping content, creating accounts and posting fake comments or reviews, as well as consuming scarce resources. “If left unchecked, bots can perform these nefarious actions at scale,” warned scientists, including those from the University of California, Irvine. For over two decades, Captchas have been deployed as security checks by websites to block potentially harmful bots by presenting puzzles that are supposed to be straightforward for people to solve – but very difficult for computers. Earlier forms of Captcha, for instance, asked users to transcribe distorted text from an image, but with advances in computer vision and machine learning, bots soon caught up to recognise the text with near perfect accuracy. Engaged in an arms race with bots, Captchas have since evolved into an annoying presence on the internet, becoming increasingly more and more difficult to solve for both bots and humans. However, the new yet-to-be peer-reviewed research, posted in arXiv, finds bots are able to quickly crack Captcha tests with ease, suggesting global effort users put into cracking these puzzles every day may be more trouble than it’s worth. In the study, scientists assessed 200 of the most popular websites and found 120 still used Captcha. They took the help of 1,000 participants online from diverse backgrounds – varying in location, age, sex and educational level – to take 10 captcha tests on these sites and gauge their difficulty levels. Researchers found many bots described in scientific journals could beat humans at these tests in both speed and accuracy. Some captcha tests took human participants between nine and 15 seconds to solve, with an accuracy of about 50 to 84 per cent, while it took the bots less than a second to crack them, with up to near perfection. “The bots’ accuracy ranges from 85-100 per cent, with the majority above 96 per cent. This substantially exceeds the human accuracy range we observed (50-85 per cent),” scientists wrote in the study. They also found that the bots’ solving times are “significantly lower” or nearly the same as humans in almost all cases. Since current Captchas do not meet the required security goal of keeping bots away, researchers have called for better and more dynamic approaches to protect websites. Read More Shock for millions of voters as details exposed in hack – which went undetected for a year AI-driven cyberattack can now steal your passwords with near 100 per cent accuracy, study warns More than a million NHS patients’ details compromised after cyberattack ‘Billions’ of computers potentially affect by huge security vulnerability AI breakthrough could dramatically reduce planes’ global warming impact Earth hit by powerful ‘X-1’ solar flare, after fears of ‘cannibal’ blast

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A drag queen who dressed as Jesus Christ and performed a rock rendition of The Lord's Prayer has been arrested in the Philippines under the country's obscenity laws, sparking a fierce debate about free speech and protections for members of the LGBTQ community.