India is caught in this heartbreaking water paradox. From 1980 to 2021, the Indus and the Ganga tell very different stories. More rainfall raised the Indus’ flow by about 8%, but the Ganga shrank by almost 17%. A study from IIT Gandhinagar shows that the core issue isn’t rising heat, but how we manage or mismanage our water. Groundwater and surface water function as a single, connected system. Intensive pumping, combined with weakening monsoon rainfall, has disturbed this balance. The Ganga now increasingly loses water to aquifers instead of being sustained by them, underscoring the urgent need for integrated, climate-resilient water management.
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We’ve all heard about antibiotic resistance — a major health challenge of our time. At IIT Gandhinagar, researchers took a step to address the problem of localised bacterial infections. Instead of relying on pills or light, they turned to ultrasound, the same sound waves used in medical scans. In lab experiments with E. coli, when ultrasound was paired with a BODIPY (sonosensitizer) and tiny microbubbles, the bacterial count dropped by more than 99.9%, making those sound waves a weapon against bacteria. It’s a striking idea: using sound as an alternative approach when bacteria become drug resistant, especially when infections are localised. This approach could open new possibilities for tackling infections that hide deep in the body or that resist traditional antibiotics.
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Ten years from now, three spacecraft will be launched into orbit around the sun, approximately 50 million kilometres from Earth, to detect ripples in the spacetime called gravitational waves (GWs). This detector is named Laser Interferometer Space Antenna (LISA), and has an arm length of 2.5 million kilometres between its spacecraft, a million times larger than the terrestrial LIGO observatory, enabling the detection of GWs in milli-Hertz band. LISA will detect GWs from supermassive black hole binaries. The authors propose the use of a meshfree method in accelerating the parameter estimation of such sources.
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Freezing of gait is a common symptom of Parkinson’s disease, where patients briefly lose the ability to move forward while walking. Vibrations of small frequency on the skin at various locations, or vibrotactile stimulation, have been shown to help overcome this freezing. Studying Parkinson’s patients alongside healthy individuals, the authors compare how accurately these groups perceive vibrotactile input at various locations such as ‘Thigh’, ‘Finger’, ‘Wrist’ etc. They find that ‘Thigh’ is the best location for vibrotactile input, followed by ‘Wrist’, in Parkinson’s patients.
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A sugar found in the outer skeletons of shellfish, Chitosan, offers durability to materials called hydrogels - three-dimensional networks of polymers in water used in biological and medicinal contexts. Conducting a review on chitosan-based hydrogels, the authors highlight the various methods to synthesise these hydrogels. They outline how characterization of these hydrogels is carried out, for important physical properties such as injectibility and recoverability, and biological properties such as drug delivery, viability, and compatibility.
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