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Tag: grown

Sahara has grown 10% in 100 years, research finds

Sahara has grown 10% in 100 years, research finds

Science
March 30 (UPI) -- Africa's Sahara Desert has grown 10 percent in nearly 100 years, according to a new study by scientists at the University of Maryland.The Sahara, which is the world's largest warm-weather desert and roughly equal in size to the contiguous United States with 3.6 million square miles, has expanded by 11 percent to 18 percent depending on the season.The study was published Thursday in the American Meteorological Society's Journal of Climate.The researchers analyzed annual rainfall data recorded throughout Africa until 2013. When the average rainfall is less than 4 inches of rain per year or less, an area is considered a desert."The trends in Africa of hot summers getting hotter and rainy seasons drying out are linked with factors that include increasing greenhouse gases and ...
Mini tumours grown in chemotherapy breakthrough

Mini tumours grown in chemotherapy breakthrough

Technology
Scientists have successfully grown mini versions of patients' tumours in a lab - and then tested them against dozens of drugs to find the best possible treatment.The technique could mean patients get effective chemotherapy sooner - and are spared unnecessary side effects from drugs that do not work.Scientists have hailed the uniquely personalised treatment as "extremely promising".Doctors currently treat patients with an element of guesswork, only knowing for sure whether a drug is working when they return for a CT scan several months into treatment.But scientists at the Institute of Cancer in London were able to screen lab-grown replicas of patients' tumours against a range of drugs in just two weeks.Image:It is hoped the research will allow doctors to decide the best treatment for each p...
Air Force pilot shortage has grown, is 'stretching the force to the limit'

Air Force pilot shortage has grown, is 'stretching the force to the limit'

Business
Nov. 10 (UPI) -- The Pilot shortage that has dogged the U.S. Air Force has gotten worse as the service's top officials say the shortage has surged to about 2,000 airmen.In September, U.S. Air Force Chief of Staff Goldfein told attendees at the annual Air Crew Summit at Joint Base Andrews in Maryland that the service is "in a crisis" that could compromise its ability to defend the nation. According to Goldfein and Air Force Secretary Heather Wilson, it's gotten worse."Last summer, we were reporting to people that we were about 1,500 pilots short in the Air Force -- and we expected it to get worse," Air Force Secretary Heather Wilson told reporters on Thursday. "Almost 2,000 pilots short of a force that has 20,000 pilots, so that's one in 10 that we're short."At the Air Crew Summit, Goldfein...