1) The first smartphone, the IBM Simon, was introduced in 1992 and featured a touchscreen, email capabilities, and apps such as a calendar and calculator.

2) The word "flower" contains two vowels: O and E.

3) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

4) The ocean covers about 71% of the Earth's surface and contains roughly 97% of the planet's water.