1) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).

2) The world's first insurance policy was issued in 1347 in Genoa, Italy. It insured against the risk of maritime trade.

3) The impact of social media platforms on society and politics has been a subject of debate, including concerns about misinformation, privacy, online harassment, and the influence of these platforms on public opinion and democratic processes.

4) The world's most expensive car is the Bugatti La Voiture Noire, which sold for over $18 million.