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

2) Insurance premiums are the payments made by policyholders to insurance companies in exchange for coverage.

3) The concept of 3D printing, also known as additive manufacturing, was first introduced in the 1980s and has since revolutionized prototyping and small-scale production.

4) The global push for COVID-19 vaccination campaigns has been a significant focus, with the development and distribution of vaccines to combat the spread of the virus and protect public health.