What empire or dynasty invented the zero, knew the earth rotated around its axis, and sponsored the work of authors writing in sanskrit? han zhou gupta aryan

During what century did muhammad recieve his first revelation from god

What do the differing approaches of booker t. washington and w.e.b du bois suggest about their views of american society?

When gandhi reached the arabian sea at the end of the salt march, he picked up raw salt from the water and made a declaration: “with this, i am shaking the foundations of the british empire.” how do you think this quotation is symbolic of gandhi’s works and philosophy?