1) The invention of the transistor by Bell Laboratories in 1947 revolutionized electronics and paved the way for the development of smaller, more efficient electronic devices.

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

3) The intensity of cyclones is often measured using the Saffir-Simpson Hurricane Wind Scale, which categorizes them based on their sustained wind speeds.

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