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 oldest living plant is believed to be a clonal shrub called "Old Tjikko" in Sweden, estimated to be over 9,500 years old.

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

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