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

2) 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.

3) The Beatles hold the record for the most number-one hits on the Billboard Hot 100 chart, with 20 songs reaching the top spot.

4) The word "umbrella" contains three vowels: U, E, and A.