1) Usain Bolt of Jamaica holds the world records for the 100 meters and 200 meters sprints, with times of 9.58 seconds and 19.19 seconds, respectively.

2) Jennifer Lawrence is an American actress known for her roles in films such as "The Hunger Games" series, "Silver Linings Playbook," and "Joy." She has won an Academy Award and several Golden Globe Awards, establishing herself as one of the leading actresses of her generation.

3) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.

4) As of 2023, the COVID-19 pandemic continues to impact countries worldwide, with efforts focused on vaccination campaigns, public health measures, and economic recovery.