1) The tongue of a blue whale is so big that about 50 people could stand on it.

2) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.

3) The Russian Revolution in 1917 resulted in the overthrow of the monarchy and the establishment of a communist government under Vladimir Lenin.

4) As of 2023, the COVID-19 pandemic continues to impact countries worldwide, with efforts focused on vaccination campaigns, public health measures, and economic recovery.