What is Doppler Ultrasound Scan? Ultrasound is a high-frequency sound that you cannot hear but it travels through fluid and soft tissues. However, it bounces back, or echoes, when it hits a more solid ...

The Doppler shift of sound or light waves from a moving source is familiar to physicists and non-physicists alike. Now, researchers in China and Australia have seen the more exotic inverse Doppler ...

Bengaluru: Heavy rain and winds in and around the city have time and again exposed a critical gap in its preparedness — the ...