1) The universe is estimated to be around 13.8 billion years old.

2) The word "yesterday" contains three vowels: E, A, and A.

3) The signing of the Magna Carta in 1215 laid the foundation for modern democratic principles and limited the powers of the monarchy in England.

4) The first consumer digital video recorder (DVR), the TiVo, was introduced in 1999 and allowed users to record and store television programs for later viewing.