1) The longest English word is "pneumonoultramicroscopicsilicovolcanoconiosis," which refers to a lung disease caused by inhaling very fine silica dust.

2) The most-watched TV series finale in the United States was "MAS*H," with an estimated 105 million viewers.

3) Gelato, an Italian frozen dessert, is similar to ice cream but has a denser and creamier texture. It is made with milk, sugar, and various flavorings, such as fruit, chocolate, or nuts. Gelato is churned at a slower speed than ice cream, incorporating less air and resulting in a richer consistency. It is served at a slightly warmer temperature than ice cream, allowing the flavors to be more pronounced. Gelato is a beloved treat, particularly in Italy, where it is enjoyed in countless flavors and gelaterias.

4) The Earth's core is primarily composed of iron and nickel and is as hot as the surface of the sun.