1) 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.

2) The word "pizza" contains two vowels: I and A.

3) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.

4) The process of photosynthesis, performed by plants, algae, and some bacteria, is responsible for producing the oxygen we breathe.