1) Mount Everest, located in the Himalayas, is the highest mountain on Earth, reaching a peak elevation of 29,032 feet (8,848 meters).

2) The world's oldest living plant is believed to be a clonal shrub called "Old Tjikko" in Sweden, estimated to be over 9,500 years old.

3) Insurance premiums are the payments made by policyholders to insurance companies in exchange for coverage.

4) The word "oxygen" contains two vowels: O and E.