Global Iodine Deficiency Disorder Prevention Day was observed on 21 October to spread awareness of iodine deficiency and its health effects. Iodine is a vital micronutrient the body needs to make thyroid hormones, which support the body's growth, metabolism and brain development.
Police Commemoration Day, also called Police Shaheed Diwas or Police Martyrs Day, is marked on 21 October to pay tribute to police personnel who laid down their lives on duty. It recalls 21 October 1959, when 10 Indian policemen on patrol along the India–China border lost their lives when Chinese troops attacked them at Hot Springs in the high-altitude region…
Researchers have described three centipede species new to science from southern India: Rhysida quadrispinosa, Rhysida coorgensis and Rhysida neyyarensis. Rhysida coorgensis takes its name from Coorg in Karnataka, and Rhysida neyyarensis from Kerala's Neyyar Wildlife Sanctuary. With these additions, India now has 23 known species of the genus Rhysida.
A Spot-bellied Eagle-Owl (Bubo nipalensis / Ketupa nipalensis) has been sighted in the Janakikkad forest of Kozhikode district, Kerala, marking the species' first known record in the district. The bird is a member of the family Strigidae in the order Strigiformes and ranks as the second-largest owl found in India.
India has begun evaluating all 1,211 regularly occurring bird species, under the IUCN framework. The work is led by the Zoological Survey of India (ZSI), the IUCN SSC Center for Species Survival India–Wildlife Trust of India and the State of India's Birds initiative.
In Maharashtra's Beed district, a camera trap set up in the Brahmgaon forest range has photographed a four-year-old male tiger weighing more than 200 kg, the first tiger record there in close to a century.
ISRO has completed a series of tests on separating the Crew Module and Service Module (CM–SM) at the Vikram Sarabhai Space Centre (VSSC) in Thiruvananthapuram, Kerala. The trials were meant to confirm that the two modules part safely before the crew module re-enters Earth's atmosphere during the Gaganyaan mission.
India's solar observatory Aditya-L1 has produced Doppler velocity images of the Sun's corona with its Visible Emission Line Coronagraph (VELC). These images let scientists follow how solar plasma moves and work out which way Coronal Mass Ejections (CMEs) are heading. The software that processes VELC data was built by the Indian Institute of Astrophysics (IIA).
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