Why in the news? Astrosat mission, India’s first Space observatory completes 10 years. Astrosat Mission What is it?: ASTROSAT is India’s first dedicated multi-wavelength space observatory, launched by ISRO in 2015 from Satish Dhawan Space Centre (Sriharikota) using the PSLV-C30. … Continue reading →

Development The hypothesis of seafloor spreading was put forward by H. Harry Hess in 1960. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere. Basaltic magma rises from the fractures and cools on the ocean floor … Continue reading →

Idea The hypothesis of seafloor spreading was put forward by H. Harry Hess in 1960. Basis Theory for Seafloor Spreading Theory Convection Current Theory Put forward by Arthur Holmes in the 1930s. The theory discussed the possibility of convection currents … Continue reading →

Development Continental Drift theory was put forth by Alfred Wegener in 1912. According to Wegener, all the continents formed a single continental mass which is called “Pangaea” and this supercontinent was surrounded by a mega ocean called “Panthalassa ”. Later … Continue reading →