1) The Internet of Things (IoT) refers to the network of physical devices, vehicles, appliances, and other objects embedded with sensors, software, and connectivity.

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

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

4) The first photograph of a black hole was captured in 2019 using a network of telescopes around the world.