1) The national animal of Canada is the beaver.

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 Earth's core is primarily composed of iron and nickel and is as hot as the surface of the sun.

4) The shortest war in history lasted only 38 to 45 minutes between Britain and Zanzibar in 1896.