1) Online banking and mobile banking have become increasingly popular, providing convenient access to banking services through digital platforms.

2) The invention of the printing press by Johannes Gutenberg in the 15th century revolutionized the spread of knowledge and played a key role in the Renaissance.

3) The Sahara Desert, located in North Africa, is the largest hot desert in the world, covering an area of about 9.2 million square kilometers (3.6 million square miles). It is characterized by vast stretches of sand dunes, rocky plateaus, and extreme temperatures.

4) A single bolt of lightning can heat the surrounding air to temperatures five times hotter than the surface of the sun.