This is a social science video that answers - What is earthquake? - How does earthquake occur? - What are the different types of waves? An unexpected movement of the Earth's surface is cal...
219 viewsThe Summer of Love was a social phenomenon that occurred during the summer of 1967, when as many as 100,000 people converged on the Haight-Ashbury neighborhood of San Francisco, initiating a major cul...
201 views