1) The name "Bluetooth" comes from the 10th-century Danish king, Harald Bluetooth, who united Denmark and Norway.

2) The world's largest ocean, the Pacific Ocean, covers an area of approximately 63 million square miles.

3) The push for gender equality and women's empowerment has gained momentum worldwide, with increased advocacy for equal rights, representation in leadership positions, and efforts to address issues such as gender-based violence and discrimination.

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