1) Rihanna, born Robyn Rihanna Fenty, is a Barbadian singer, actress, and businesswoman. She has achieved great success in the music industry with hits like "Umbrella," "Diamonds," and "Work," and has also ventured into the worlds of fashion and cosmetics with her brands.

2) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.

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

4) The Pacific Ocean is the largest ocean on Earth, covering more than 30% of the planet's surface.