Gravitational waves are tiny ripples in spacetime produced when massive objects accelerate, especially during some of the most energetic events in the universe. But what does it truly mean for spacetime itself to “ripple”? How can something so abstract produce measurable physical effects? The concept originates from Albert Einstein’s general theory of relativity (1916), which describes gravity not as a Continue Reading »

What if we had a digital copy of Earth that could help us test decisions before making them in real life? This is exactly what scientists are building today through Digital Twins of the Earth. A digital twin is a virtual representation of the real world that is continuously updated using satellite, weather station, sensor, and computer data. Unlike a Continue Reading »

Authors- Ashok Ghildiyal and Ashish Joshi, Indian Institute of Remote Sensing, ISRO Dehradun NOAA weather satellites continuously transmit Automatic Picture Transmission (APT) signals that carry live images of the Earth’s surface. These signals can be received using a software-defined radio (SDR) such as an RTL-SDR dongle, paired with a suitable antenna and decoding software. The NOAA satellites, particularly NOAA-18 and Continue Reading »

Rice is the staple food for nearly two-thirds of India's population, particularly in eastern, northeastern and southern India, and is also consumed occasionally in the northern and central parts of the country. Indian Council of Agricultural Research (ICAR) is executing a 5-year pilot project on crop diversification (2023–2028) under the National Food Security and Nutrition Mission (NFSNM) in order to Continue Reading »

Sal forests cover 11 million hectares in the Indian subcontinent. They are important for the environment and the economy because they support biodiversity and provide a range ecological services including livelihoods of indigenous people. These forests face a major threat from an insect called the Sal Heartwood Borer, or "Hoplo". When these beetles multiply quickly, they kill thousands of trees. Continue Reading »