1) The world's largest ocean, the Pacific Ocean, covers an area of approximately 63 million square miles.

2) The Brexit process, initiated by the United Kingdom's referendum in 2016, led to the country's withdrawal from the European Union in 2020, marking a significant political and economic change for both the UK and the EU.

3) The total length of your blood vessels can circle the Earth more than twice.

4) The word "oxygen" contains two vowels: O and E.