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

2) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.

3) Orchids are one of the largest families of flowering plants, with over 25,000 species.

4) The world's first stock exchange was established in Amsterdam in 1602.