1) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.

2) The Dead Sea, located between Jordan and Israel, is the lowest point on Earth's surface. Its saltwater is so dense that people can easily float on its surface.

3) The development of the World Wide Web Consortium (W3C) and web standards has ensured interoperability and compatibility across different web browsers and devices.

4) The Earth's core is hotter than the surface of the Sun.