1) The corpse flower, or titan arum, is known for its unpleasant smell, often compared to that of rotting flesh.

2) The invention of the printing press by Johannes Gutenberg in the 15th century revolutionized the spread of knowledge and played a key role in the Renaissance.

3) The word "island" contains two vowels: I and A.

4) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.