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GS 2 What is the Sri Lanka political crisis all about? Sri Lanka has been facing a political crisis for a fortnight now, with Mr. Sirisena abruptly sacking his Prime Minister Ranil Wickremesinghe and replacing him with Mr. Rajapaksa, a former President, apparently defying the Constitution or more specifically, its 19th Amendment — a 2015 legislation that clipped the powers of the President significantly. In Assam, another language flashpoint The killing of five Bengalis in eastern Assam’s Sadiya on November 1 has led to an uneasy calm in a State divided over language amid a bid by the Central government to pass the Citizenship (Amendment) Bill, 2016 GS 3 National body set up to study rare form of diabetes A National Monogenic Diabetes Study Group has been formed to identify cases of monogenic diabetes across the country. Supported by the Indian Council of Medical Research (ICMR), the Madras Diabetes Research Foundation (MDRF) and Dr. Mohan’s Diabetes Specialities Centre (DMDSC) will be the national coordinating centre for the study group. ISRO invites foreign ‘riders’ to Venus Seeks experiment ideas from space agencies, universities and researchers polio vaccine contamination is a worry? Since April 2016, all oral polio vaccines (OPV) across the world contain only two of the three polio serotypes — Type 1 and Type 3. Type 2 is banned because the wild, disease-causing version of this virus was eradicated globally by 1999, and because OPV itself can cause polio in rare cases. AIIMS-led team develops sensitive tests for pulmonary, pleural TB A highly sensitive diagnostic test for pulmonary TB and pleural TB has been developed by a multi-institutional team led by Jaya Sivaswami Tyagi from the Department of Biotechnology at AIIMS. The diagnostic test makes use of a DNA aptamer (a small single-stranded DNA molecule that binds to a specific target molecule) that shows high binding affinity to a TB antigen. Groundwater depletion alarming in northwest, central India Natural recharge during monsoon may not help much if groundwater depletion becomes acute, as rainfall of past years controls current storage