1) The largest known dinosaur, Argentinosaurus, weighed around 70-100 tons and measured up to 100 feet in length.

2) The concept of sovereignty refers to the supreme authority and power of a state to govern itself, make decisions, and control its own territory without interference from external forces.

3) The Southern Ocean surrounds Antarctica and is the coldest and least-visited ocean.

4) The windshield wipers were invented by a woman named Mary Anderson in 1903.