Today is National Science Day—a day to celebrate the spirit of science and scientific temper across the county. It is a day to commemorate Sir C V Raman’s discovery of the Raman effect. This year, the theme of National Science Day is ‘Women in Science’, celebrating the contributions of women scientists to the field of science in India.

Obesity has become a global concern over the last four decades as the number of obese and overweight individuals has tripled since 1975. In 2016, about one in five children across the world, aged 5-19 years, were overweight or obese and half of them lived in Asia. The obesity epidemic, which was once prevalent in high-income, developed countries, has today soared in low- and middle-income economies, particularly in cities. A similar trend is observed in the case of hypertension—a major risk of obesity. In India, many studies have assessed the prevalence of obesity and hypertension and the correlation between them. However, recent data on this, particularly regarding children and adolescents from urban and rural areas, is scarcely available. Now, a recent study by researchers from India and the UK, published in the journal BMJ Open, provides some insights into the current prevalence rates for obesity and hypertension among adolescents in Northern India.

Powered by citizen science, the State of India’s Birds report calls for conservation efforts to save India’s aves.

According to the National Tiger Estimation survey, the number of tigers has surged to 2967, indicating a doubling of tiger numbers since the first survey conducted in 2006 under a revised monitoring methodology. Although this change may sound exciting to the layperson, some scientists have flagged concerns about accepting these claimed changes in tiger numbers. In a recent study, published in the journal Conservation Science and Practice, researchers from India and Norway refer to important mathematical, statistical and ecological principles and highlight how India’s tiger survey results deviate from these principles.