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

2) The windshield wipers were invented by a woman named Mary Anderson in 1903.

3) 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.

4) The Sydney Opera House, situated in Sydney, Australia, is an iconic architectural masterpiece and a UNESCO World Heritage site. Its unique design, resembling sailboats or shells, has made it one of the most recognized and photographed landmarks in the world.