Why is "Leather in Judaism" trending?

Wikipedia Overview

Leather has played an important role in Judaism and in Jewish life. Many items widely used by observant Jews are made from leather, such as:Torah scrolls are handwritten copies of the Torah (Pentateuch), the holiest book within Judaism. It is inscribed by a Sofer on leather parchment. Torah scrolls must meet extremely strict standards of production.
Mezuzahs are pieces of parchment inscribed with specified Hebrew verses from the Torah. Jewish religious law requires that a mezuzah be affixed to every doorway in the home, apart from bathrooms and closets too small to qualify as rooms.
Tefillin (phylacteries) are a set of small black leather boxes containing scrolls of parchment inscribed with verses from the Torah, which are worn by observant Jews during weekday morning prayers.
Halizah is a ritual ceremony described in the Torah. The Torah instructs that if a married man dies childless, the widow is obligated to marry her dead husband's brother in a process called Yibum. By performing the haliza ceremony, which involves the taking off of her brother-in-law's leather shoe by the widow, the widow and her husband's brother could avoid their duty to marry. After the ceremony, the brother-in-law is released from his obligation to marry the widow and she becomes free to marry whomever she desires
Malkot was corporal punishment by whipping with a leather whip administered in Biblical times.