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 Mongol Empire, under the leadership of Genghis Khan, became the largest contiguous empire in history, spanning from Asia to Europe.

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

4) The corpse flower, or titan arum, is known for its unpleasant smell, often compared to that of rotting flesh.