1) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.

2) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.

3) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.

4) Hindu mythology, deeply rooted in Indian culture, revolves around a pantheon of gods and goddesses, including Brahma, Vishnu, Shiva, Saraswati, and Lakshmi. These deities represent various aspects of existence and play important roles in Hindu religious traditions and epics like the Mahabharata and Ramayana.